https://kermitmurray.com/msterms/index.php?title=ASMS_1974&feed=atom&action=historyASMS 1974 - Revision history2024-03-29T11:22:16ZRevision history for this page on the wikiMediaWiki 1.38.7https://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20661&oldid=prevKkmurray: /* Abundance, intensity, relative intensity, base peak. */2024-03-15T15:43:58Z<p><span dir="auto"><span class="autocomment">Abundance, intensity, relative intensity, base peak.</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Abundance, intensity, relative intensity, base peak. ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Abundance, intensity, relative intensity, base peak. ==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">" ty"</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>"[[Abundance]]" and "[[intensity]]" are often used interchangeably. The dictionary definitions of the words would be more in accord with the use of "abundance" of ions and "<ins style="font-weight: bold; text-decoration: none;">intensity</ins>" of peaks. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>"[[Abundance]]" and "[[intensity]]" are often used interchangeably. The dictionary definitions of the words would be more in accord with the use of "abundance" of ions and "<del style="font-weight: bold; text-decoration: none;">tntensity</del>" of peaks. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>"Peak height" or "intensity " may be expressed in any arbitrary units, such as ion current or mm measured on an analog record. "[[Relative intensity]]" implies normalization to some scale, and there is nothing inherently better about any one scale than others. Selection of the scale is a matter of arbitrary choice by the spectroscopist in light of his particular problem. He may prefer to express relative intensity as per cent of total ionization from initial specific mass XX; the commonly used and, I think, fairly clear symbol for such values is % XX. Otherwise, he may define the intensity scale by assigning a value of 100.0 to the molecular-ion peak, to the most intense peak, or to any other peak that suits his convenience. Twenty to 25 years ago, we used the term "[[base peak]]" for the peak so selected as the base for the scale of relative intensities (10). In current usage, the term has come to mean the most intense peak in the spectrum as well as the peak assigned a relative intensity of 100.0. This choice of intensity scale derives, I think, from its use in the API Catalog(9), and it seems an eminently good choice for cataloging purposes. For other purposes, such a choice may have no advantage over other possibilities or, worse, as in the comparison of spectra of various isotopic species of a compound(11), it may tend to obscure significant relationships and to interfere with interpretation of the data. I suggest a return to the earlier, less restricted sense of "base peak, " which may or may not coincide with the strongest or most intense peak. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>"<ins style="font-weight: bold; text-decoration: none;">[[</ins>Peak height<ins style="font-weight: bold; text-decoration: none;">]]</ins>" or "intensity " may be expressed in any arbitrary units, such as ion current or mm measured on an analog record. "[[Relative intensity]]" implies normalization to some scale, and there is nothing inherently better about any one scale than others. Selection of the scale is a matter of arbitrary choice by the spectroscopist in light of his particular problem. He may prefer to express relative intensity as per cent of total ionization from initial specific mass XX; the commonly used and, I think, fairly clear symbol for such values is % XX. Otherwise, he may define the intensity scale by assigning a value of 100.0 to the molecular-ion peak, to the most intense peak, or to any other peak that suits his convenience. Twenty to 25 years ago, we used the term "[[base peak]]" for the peak so selected as the base for the scale of relative intensities (10). In current usage, the term has come to mean the most intense peak in the spectrum as well as the peak assigned a relative intensity of 100.0. This choice of intensity scale derives, I think, from its use in the API Catalog(9), and it seems an eminently good choice for cataloging purposes. For other purposes, such a choice may have no advantage over other possibilities or, worse, as in the comparison of spectra of various isotopic species of a compound(11), it may tend to obscure significant relationships and to interfere with interpretation of the data. I suggest a return to the earlier, less restricted sense of "base peak," which may or may not coincide with the strongest or most intense peak. </div></td></tr>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>3. V. Let's use "base peak" as the peak selected as the base for the "relative <del style="font-weight: bold; text-decoration: none;">inten.sity </del>" scale. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>3. V. Let's use "base peak" as the peak selected as the base for the "relative <ins style="font-weight: bold; text-decoration: none;">intensity </ins>" scale. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>3.VII. The terms "abundance of ions " and "intensity of peaks" are to be preferred. <del style="font-weight: bold; text-decoration: none;">o/J::</del>xx to be used to express relative intensity as per cent of total ionization from initial specific mass xx; the lower limit (M/z = 12 in organic mass spectrometry?) has to be defined<del style="font-weight: bold; text-decoration: none;">, </del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>3.VII. The terms "abundance of ions " and "intensity of peaks" are to be preferred. <ins style="font-weight: bold; text-decoration: none;">%&Sigma;</ins>xx to be used to express relative intensity as per cent of total ionization from initial specific mass xx; the lower limit (M/z = 12 in organic mass spectrometry?) has to be defined<ins style="font-weight: bold; text-decoration: none;">.</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"> </ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The term "base peak" is to be assigned a relative intensity of 100.0, without necessarily referring to the most intense peak in 'the mass spectrum. For cataloging purposes the base peak should be the most intense peak.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The term "base peak" is to be assigned a relative intensity of 100.0, without necessarily referring to the most intense peak in 'the mass spectrum. For cataloging purposes the base peak should be the most intense peak.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>---- </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>---- </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>3.IX. do not like the symbol <del style="font-weight: bold; text-decoration: none;">LXX </del>for total ionization between the mass-to-charge ratios i and j. I feel that the term <del style="font-weight: bold; text-decoration: none;">EIM</del>/<del style="font-weight: bold; text-decoration: none;">ZM</del>/Z=i,j is much more explicit and that this spectrum should be referred to as a "normalized mass spectrum".</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>3.IX. <ins style="font-weight: bold; text-decoration: none;">I </ins>do not like the symbol <ins style="font-weight: bold; text-decoration: none;">&Sigma;xx </ins>for total ionization between the mass-to-charge ratios i and j. I feel that the term <ins style="font-weight: bold; text-decoration: none;">&Sigma;I<sub>M</ins>/<ins style="font-weight: bold; text-decoration: none;">Z <sub>M</ins>/Z=i,j<ins style="font-weight: bold; text-decoration: none;"></sub></sub> </ins> is much more explicit and that this spectrum should be referred to as a "<ins style="font-weight: bold; text-decoration: none;">[[</ins>normalized mass spectrum<ins style="font-weight: bold; text-decoration: none;">]]</ins>".</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Recording of solely metastable peaks. ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Recording of solely metastable peaks. ==</div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20546&oldid=prevKkmurray at 02:35, 11 March 20242024-03-11T02:35:43Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:35, 10 March 2024</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><big>A progress report from ASTM Committee E-14 Subcommittee 10</big></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><big>A progress report from ASTM Committee E-14 Subcommittee 10</big></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Subcommittee 10 on Definitions and Terms of ASTM Committee E-14 on Mass Spectrometry was established in 1970 at the Eighteenth Annual Conference on Mass Spectrometry and Alied Topics in San Francisco. The objective was to "assume responsibility for a long-term, deliberate, and comprehensive study of the words, phrases, terms, numbers, and scientific language of mass spectrometry" and to formulate recommendations that might be generally acceptable for standard usage. Glenn Cook, the subcommittee chairman, named Sy Meyerson, Dan Oblas, and Jerry McCleary chairmen of task groups designated as organic, inorganic, and instrumental, respectively. To broaden the base of participation beyond the formal task-group memberships, Meyerson and McCleary convened a meeting of interested persons at the 1970 Triennial International Conference on Mass Spectrometry in Brussels. Twenty-nine of the 35 to 40 persons in attendance, most of them from Western European countries, signified an interest in working with one or more of the task groups. A dialog conducted since then among members and correspondents of the organic task group has elicited input from 26 persons in addition to the chairman, McCleary prepared a list of terms in need of precise definition, intended to serve as a starting point for a similar dialog among people with instrumental interests, but the hoped-for response did not materialize. The inorganic task group lost its chairman by resignation in Early 1973 and it has not functioned, Because of a change in job responsibilities, Cook resigned as chairman of the subcommittee, also in 1973, and a replacement for him has not been found. Partly because of the lack of a chairman, the work of the subcommittee has been in abeyance for over a year. In the meantime, IUPAC has established a Mass Spectrometry Subcomission of the Commission on Molecular Structure and Spectroscopy, which in turn is part of the Division of Physical Chemistry. This subcommission, under John Beynon's chairmanship, has undertaken a review of the terminology of mass spectrometry and has requested access to the body of opinion accumulated by ASTM E-14 Subcommittee 10. In view of all the circumstances, ASTM Committee E-14 at its 1974 business meeting recognized that Subcommittee 10 is no longer active and agreed to transmit its collected deliberations to the lUPAC Mass Spectrometry Subcommission for incorporation in its study of terminology.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Subcommittee 10 on Definitions and Terms of ASTM Committee E-14 on Mass Spectrometry was established in 1970 at the Eighteenth Annual Conference on Mass Spectrometry and Alied Topics in San Francisco. The objective was to "assume responsibility for a long-term, deliberate, and comprehensive study of the words, phrases, terms, numbers, and scientific language of mass spectrometry" and to formulate recommendations that might be generally acceptable for standard usage. Glenn Cook, the subcommittee chairman, named Sy Meyerson, Dan Oblas, and Jerry McCleary chairmen of task groups designated as organic, inorganic, and instrumental, respectively. To broaden the base of participation beyond the formal task-group memberships, Meyerson and McCleary convened a meeting of interested persons at the 1970 Triennial International Conference on Mass Spectrometry in Brussels. Twenty-nine of the 35 to 40 persons in attendance, most of them from Western European countries, signified an interest in working with one or more of the task groups. A dialog conducted since then among members and correspondents of the organic task group has elicited input from 26 persons in addition to the chairman, McCleary prepared a list of terms in need of precise definition, intended to serve as a starting point for a similar dialog among people with instrumental interests, but the hoped-for response did not materialize. The inorganic task group lost its chairman by resignation in Early 1973 and it has not functioned, Because of a change in job responsibilities, Cook resigned as chairman of the subcommittee, also in 1973, and a replacement for him has not been found. Partly because of the lack of a chairman, the work of the subcommittee has been in abeyance for over a year. In the meantime, IUPAC has established a Mass Spectrometry Subcomission of the Commission on Molecular Structure and Spectroscopy, which in turn is part of the Division of Physical Chemistry. This subcommission, under John Beynon's chairmanship, has undertaken a review of the terminology of mass spectrometry and has requested access to the body of opinion accumulated by ASTM E-14 Subcommittee 10. In view of all the circumstances, ASTM Committee E-14 at its 1974 business meeting recognized that Subcommittee 10 is no longer active and agreed to transmit its collected deliberations to the lUPAC Mass Spectrometry Subcommission for incorporation in its study of terminology.</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A framework for discussion was delineated, at an early stage of the study, in terms of twelve problem areas, each of which contains one or more troublesome terms and/or symbols. Each problem area is defined below and followed by the pertinent responses, which are reported verbatim to better convey the flavor of the exchanges. The problem areas are identified by Arabic numerals 1 to 12, and the replies by Roman numerals I to X, some of which came from individuals and others from groups of two or more persons who responded jointly. Some of the letters did not comment on all twelve problem areas. All the comments received in response to an April 1972 mailing to all participants are reported here. I have added a few remarks of my own, which are identified by the initials S.M. Literature references are collected at the end of the report. Item 13 comprises a series of suggestions, all dealing with nomenclature related to metastable ions, received in June 1972 from John Beynon. In part, these suggestions overlap matters that had already been considered in correspondence with all the participants in the dialog. Most recently, all of the material presented here under items 1 to 13, inclusive, was circulated to the formal task-group membership. Their comments are not included here but will be reported to the IUPAC subcommission. Item 14 comprises a list of 19 terms, all pertinent to instrument performance specifications, selected by McCleary as being particularly in need of clear definition.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A framework for discussion was delineated, at an early stage of the study, in terms of twelve problem areas, each of which contains one or more troublesome terms and/or symbols. Each problem area is defined below and followed by the pertinent responses, which are reported verbatim to better convey the flavor of the exchanges. The problem areas are identified by Arabic numerals 1 to 12, and the replies by Roman numerals I to X, some of which came from individuals and others from groups of two or more persons who responded jointly. Some of the letters did not comment on all twelve problem areas. All the comments received in response to an April 1972 mailing to all participants are reported here. I have added a few remarks of my own, which are identified by the initials S.M. Literature references are collected at the end of the report. Item 13 comprises a series of suggestions, all dealing with nomenclature related to metastable ions, received in June 1972 from John Beynon. In part, these suggestions overlap matters that had already been considered in correspondence with all the participants in the dialog. Most recently, all of the material presented here under items 1 to 13, inclusive, was circulated to the formal task-group membership. Their comments are not included here but will be reported to the IUPAC subcommission. Item 14 comprises a list of 19 terms, all pertinent to instrument performance specifications, selected by McCleary as being particularly in need of clear definition.</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Mass, mass-to-charge ratio, m/e, etc. ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Mass, mass-to-charge ratio, m/e, etc. ==</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>7.I. agree that name reactions should be kept to a minimum. I am in favor of retain.ing the terms "Stevenson's rule in its original meaning and "Mclafferty rearrangement</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>7.I. agree that name reactions should be kept to a minimum. I am in favor of retain.ing the terms "Stevenson's rule in its original meaning and "Mclafferty rearrangement</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>defined as shown below because they are fairly widely known, describe phenomena of wide occurrence and would require rather lengthy sentences for a description of what they imply. For any new names to be used as termini technici the last two criteria should be applied rigorously (it would make no sense to call cleavage XY's cleavage). </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>defined as shown below because they are fairly widely known, describe phenomena of wide occurrence and would require rather lengthy sentences for a description of what they imply. For any new names to be used as termini technici the last two criteria should be applied rigorously (it would make no sense to call cleavage XY's cleavage). </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20543&oldid=prevKkmurray at 20:17, 10 March 20242024-03-10T20:17:36Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:17, 10 March 2024</td>
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<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Progress Report from ATSM Committee E-14 Subcommittee 10, presented at the Twenty-Second Annual Conference on Mass Spectrometry and Allied Topics, Philadelphia, Pennsylvania, May 19-24, 1974. pp. 545-561 [https://www.asms.org/docs/default-source/proceedings-archive/1974_asms_22nd_conference.pdf?sfvrsn=a7f279c3_2]</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></code></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><big><big>Definitions and Terms in Mass Spectrometry</big></big></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><big><big>Definitions and Terms in Mass Spectrometry</big></big></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A framework for discussion was delineated, at an early stage of the study, in terms of twelve problem areas, each of which contains one or more troublesome terms and/or symbols. Each problem area is defined below and followed by the pertinent responses, which are reported verbatim to better convey the flavor of the exchanges. The problem areas are identified by Arabic numerals 1 to 12, and the replies by Roman numerals I to X, some of which came from individuals and others from groups of two or more persons who responded jointly. Some of the letters did not comment on all twelve problem areas. All the comments received in response to an April 1972 mailing to all participants are reported here. I have added a few remarks of my own, which are identified by the initials S.M. Literature references are collected at the end of the report. Item 13 comprises a series of suggestions, all dealing with nomenclature related to metastable ions, received in June 1972 from John Beynon. In part, these suggestions overlap matters that had already been considered in correspondence with all the participants in the dialog. Most recently, all of the material presented here under items 1 to 13, inclusive, was circulated to the formal task-group membership. Their comments are not included here but will be reported to the IUPAC subcommission. Item 14 comprises a list of 19 terms, all pertinent to instrument performance specifications, selected by McCleary as being particularly in need of clear definition.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>A framework for discussion was delineated, at an early stage of the study, in terms of twelve problem areas, each of which contains one or more troublesome terms and/or symbols. Each problem area is defined below and followed by the pertinent responses, which are reported verbatim to better convey the flavor of the exchanges. The problem areas are identified by Arabic numerals 1 to 12, and the replies by Roman numerals I to X, some of which came from individuals and others from groups of two or more persons who responded jointly. Some of the letters did not comment on all twelve problem areas. All the comments received in response to an April 1972 mailing to all participants are reported here. I have added a few remarks of my own, which are identified by the initials S.M. Literature references are collected at the end of the report. Item 13 comprises a series of suggestions, all dealing with nomenclature related to metastable ions, received in June 1972 from John Beynon. In part, these suggestions overlap matters that had already been considered in correspondence with all the participants in the dialog. Most recently, all of the material presented here under items 1 to 13, inclusive, was circulated to the formal task-group membership. Their comments are not included here but will be reported to the IUPAC subcommission. Item 14 comprises a list of 19 terms, all pertinent to instrument performance specifications, selected by McCleary as being particularly in need of clear definition.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">__TOC__</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Mass, mass-to-charge ratio, m/e, etc. ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Mass, mass-to-charge ratio, m/e, etc. ==</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>12.IX. It would be useful if abbreviations were defined once in every article, the only exceptions being those which are in common usage in physics and chemistry. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>12.IX. It would be useful if abbreviations were defined once in every article, the only exceptions being those which are in common usage in physics and chemistry. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">===</del>Additional comments and questions<del style="font-weight: bold; text-decoration: none;">===</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"><big>'''</ins>Additional comments and questions<ins style="font-weight: bold; text-decoration: none;">'''</big></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>VI. Another point: should the Society support the effort to supplant other systems of units by the SI units, as the British Chemical Society is doing? (We have some reservations about expressing ionization potentials in joules or attojoules, and pressures in milli-or micropascals, but perhaps the question ought to be addressed.) </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>VI. Another point: should the Society support the effort to supplant other systems of units by the SI units, as the British Chemical Society is doing? (We have some reservations about expressing ionization potentials in joules or attojoules, and pressures in milli-or micropascals, but perhaps the question ought to be addressed.) </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>26. "Editorial Review on Nomenclature," Org. Mass Spectrom., ''2'' 249 (1969). [{{doi}}10.1002/oms.1210020302]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>26. "Editorial Review on Nomenclature," Org. Mass Spectrom., ''2'' 249 (1969). [{{doi}}10.1002/oms.1210020302]</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">==External links==</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">*Printed in the [https://www.asms.org/docs/default-source/proceedings-archive/1974_asms_22nd_conference.pdf?sfvrsn=a7f279c3_2 1974 ASMS Proceedings]</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[category:reference]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[category:reference]]</div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20542&oldid=prevKkmurray: /* Some thoughts on nomenclature in the field of metastable ions and some suggestions of terms to be encouraged and of others to be discouraged. */ special chars2024-03-10T20:04:07Z<p><span dir="auto"><span class="autocomment">Some thoughts on nomenclature in the field of metastable ions and some suggestions of terms to be encouraged and of others to be discouraged.: </span> special chars</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:04, 10 March 2024</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>i. The region immediately preceding the electric sector should be called the ''[[first field-free region]]''; the region in front of the magnetic sector should be called ''[[second field-free region]]''. This is particularly important if we are to avoid confusion now that instruments are beginning to appear in which the ion beam passes through the magnetic sector before the electric sector. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>i. The region immediately preceding the electric sector should be called the ''[[first field-free region]]''; the region in front of the magnetic sector should be called ''[[second field-free region]]''. This is particularly important if we are to avoid confusion now that instruments are beginning to appear in which the ion beam passes through the magnetic sector before the electric sector. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>j. The slit that follows the electric sector is usually called the <del style="font-weight: bold; text-decoration: none;">~</del>-slit, whether or not it is a collector slit. I suggest the slit that follows the magnet (whether or not it is a collector slit) be called the <del style="font-weight: bold; text-decoration: none;">Y</del>-slit. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>j. The slit that follows the electric sector is usually called the <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-slit, whether or not it is a collector slit. I suggest the slit that follows the magnet (whether or not it is a collector slit) be called the <ins style="font-weight: bold; text-decoration: none;">&gamma;</ins>-slit. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>k. There is a well-known method of observing metastable peaks due to transitions occurring in the first field-free region that involves scanning the accelerating voltage at fixed electric sector voltage (due to Futrell and to Barber and Elliott). Many authors call this 11 defocusing the ion beam." This shows a complete misunderstanding of the process; the focusing is not affected in any respect, and the focal length of the sector remains fixed. The main beam is merely deflected and a new beam focused at the same point. I suggest that some other term be approved for this method. "Defocus" (and also "Refocus" that is used from time to time) should not be allowed under any circumstances. We currently use accelerating voltage scan method to describe what is done. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>k. There is a well-known method of observing metastable peaks due to transitions occurring in the first field-free region that involves scanning the accelerating voltage at fixed electric sector voltage (due to Futrell and to Barber and Elliott). Many authors call this 11 defocusing the ion beam." This shows a complete misunderstanding of the process; the focusing is not affected in any respect, and the focal length of the sector remains fixed. The main beam is merely deflected and a new beam focused at the same point. I suggest that some other term be approved for this method. "Defocus" (and also "Refocus" that is used from time to time) should not be allowed under any circumstances. We currently use accelerating voltage scan method to describe what is done. </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>n. There are a number of symbols that we are currently using. We hope that they will turn out to be those adopted as standard, but in any event, some of them are: </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>n. There are a number of symbols that we are currently using. We hope that they will turn out to be those adopted as standard, but in any event, some of them are: </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::<del style="font-weight: bold; text-decoration: none;">ε</del><sub>0</sub> = [[Activation energy]] </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::<ins style="font-weight: bold; text-decoration: none;">&epsilon;</ins><sub>0</sub> = [[Activation energy]] </div></td></tr>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::<del style="font-weight: bold; text-decoration: none;">ε</del><sup>r</sup><sub>0</sub> = [[Reverse activation energy]] </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::<ins style="font-weight: bold; text-decoration: none;">&epsilon;</ins><sup>r</sup><sub>0</sub> = [[Reverse activation energy]] </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::<del style="font-weight: bold; text-decoration: none;">ε</del><sup><del style="font-weight: bold; text-decoration: none;">‡</del></sup> = Non-fixed or internal energy of the reactant ion </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::<ins style="font-weight: bold; text-decoration: none;">&epsilon;</ins><sup><ins style="font-weight: bold; text-decoration: none;">&Dagger;</ins></sup> = Non-fixed or internal energy of the reactant ion </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>::c* = Non-fixed or internal energy of the activated complex. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>::c* = Non-fixed or internal energy of the activated complex. </div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20540&oldid=prevKkmurray: /* 𝛼-Cleavage, β-cleavage, etc. */ special characters2024-03-10T19:57:05Z<p><span dir="auto"><span class="autocomment">𝛼-Cleavage, β-cleavage, etc.: </span> special characters</span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>8.X. I think that the use of paragraph form for reporting spectra has been forced on us by some journals. This form takes less space than others. If one la afraid that the editor will refuse to allow inclusion of bis data, he presents it as concisely as possible, I say that it is better to have it in paragraph form than not at all.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>8.X. I think that the use of paragraph form for reporting spectra has been forced on us by some journals. This form takes less space than others. If one la afraid that the editor will refuse to allow inclusion of bis data, he presents it as concisely as possible, I say that it is better to have it in paragraph form than not at all.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==<del style="font-weight: bold; text-decoration: none;">𝛼</del>-Cleavage, <del style="font-weight: bold; text-decoration: none;">β</del>-cleavage, etc. ==</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==<ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-Cleavage, <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-cleavage, etc. ==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Nomenclature to identify bonds and atoms in terms of their position relative to a specific atom, functional group, localized odd electron, or charge center in a molecule continues to be a source of ambiguity. Budzlkiewicz et al.(24) state, " ... we refer to '<del style="font-weight: bold; text-decoration: none;">a</del>-cleavage' as fission of a bond originating at an which is adjacent to the one assumed to bear the charge; the definition of <del style="font-weight: bold; text-decoration: none;">B-</del>, <del style="font-weight: bold; text-decoration: none;">v </del>. . . cleavage then follows automatically. The following process would thus be described as 'a-fission of a ketone with expulsion of an alkyl radical' </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Nomenclature to identify bonds and atoms in terms of their position relative to a specific atom, functional group, localized odd electron, or charge center in a molecule continues to be a source of ambiguity. Budzlkiewicz et al.(24) state, " ... we refer to '<ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage' as fission of a bond originating at an which is adjacent to the one assumed to bear the charge; the definition of <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>, <ins style="font-weight: bold; text-decoration: none;">&gamma; </ins>. . . cleavage then follows automatically. The following process would thus be described as 'a-fission of a ketone with expulsion of an alkyl radical' </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Alpha fission.jpg|400px|center]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Alpha fission.jpg|400px|center]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>One of my correspondents suggests that, "Instead of referring to the ' ... atom assumed to bear the charge ... ' perhaps 'heteroatom' would be better," and he continues: "The reference to <del style="font-weight: bold; text-decoration: none;">𝛼</del>, <del style="font-weight: bold; text-decoration: none;">β</del>, <del style="font-weight: bold; text-decoration: none;">ɣ</del>-cleavage in this fashion leaves no Greek letter for the less common R<sub>2</sub>N+R cleavage but I suppose this could be referred to simply as N-C (or N-0, etc.) cleavage. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>One of my correspondents suggests that, "Instead of referring to the ' ... atom assumed to bear the charge ... ' perhaps 'heteroatom' would be better," and he continues: "The reference to <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>, <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>, <ins style="font-weight: bold; text-decoration: none;">&gamma;</ins>-cleavage in this fashion leaves no Greek letter for the less common R<sub>2</sub>N+R cleavage but I suppose this could be referred to simply as N-C (or N-0, etc.) cleavage. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>"A problem comes up when aromatic rings or double bonds are involved, however. How should we describe cleavages such as: </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>"A problem comes up when aromatic rings or double bonds are involved, however. How should we describe cleavages such as: </div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l297">Line 297:</td>
<td colspan="2" class="diff-lineno">Line 297:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Aromatic cleavage.jpg|center|400 px]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Aromatic cleavage.jpg|center|400 px]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Is the bond broken a or b? It is tempting to call it [[<del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage]] since the electronic stabilization of the ion is about the same as in the case of cleavage next to heteroatoms, But calling this bond the <del style="font-weight: bold; text-decoration: none;">a</del>-bond flies in the face of all my organic training. As I see it, it is more reasonable to call these forms benzylic and allylic cleavage and forget the relationship to heteroatom electron-stabilized <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Is the bond broken a or b? It is tempting to call it [[<ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage]] since the electronic stabilization of the ion is about the same as in the case of cleavage next to heteroatoms, But calling this bond the <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-bond flies in the face of all my organic training. As I see it, it is more reasonable to call these forms benzylic and allylic cleavage and forget the relationship to heteroatom electron-stabilized <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>It also seems reasonable to call R-C=O-R acyl or aroyl cleavage by organic chemistry analogy, The problem is that there is no analogy for R-C-OH-R (<del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage) in organic chemistry and it seems reasonable here to refer to such processes as alcohol cleavage, ether cleavage, amine cleavage, thiol cleavage etc. In some ways I even prefer this to <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage." </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>It also seems reasonable to call R-C=O-R acyl or aroyl cleavage by organic chemistry analogy, The problem is that there is no analogy for R-C-OH-R (<ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage) in organic chemistry and it seems reasonable here to refer to such processes as alcohol cleavage, ether cleavage, amine cleavage, thiol cleavage etc. In some ways I even prefer this to <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage." </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>How do the rest of you view this matter? </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>How do the rest of you view this matter? </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>9.I. In my opinion the term <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage should be restricted to compounds with hetero atoms (ketones ethers, amines) where the meaning can be defined clearly (R-CO-R'-> RCO<sup>+</sup> , R-O-CH<sub>2</sub>-R -> R-O<sup>+</sup>=CH<sub>2</sub>) since they all follow the same mechanism. One could adopt the </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>9.I. In my opinion the term <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage should be restricted to compounds with hetero atoms (ketones ethers, amines) where the meaning can be defined clearly (R-CO-R'-> RCO<sup>+</sup> , R-O-CH<sub>2</sub>-R -> R-O<sup>+</sup>=CH<sub>2</sub>) since they all follow the same mechanism. One could adopt the </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>terms "allylic" and "benzylic" cleavage for carbon systems. To introduce terms as amine or thiol cleavage would rather confuse matters since there are several "thiol cleavages" so that somebody not initiated would hardly know which one was referred to. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>terms "allylic" and "benzylic" cleavage for carbon systems. To introduce terms as amine or thiol cleavage would rather confuse matters since there are several "thiol cleavages" so that somebody not initiated would hardly know which one was referred to. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>9.II. Agreement again. Avoid using <del style="font-weight: bold; text-decoration: none;">𝛼</del>, <del style="font-weight: bold; text-decoration: none;">β</del>, <del style="font-weight: bold; text-decoration: none;">ɣ</del>, ..... wherever possible. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>9.II. Agreement again. Avoid using <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>, <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>, <ins style="font-weight: bold; text-decoration: none;">&gamma;</ins>, ..... wherever possible. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l314">Line 314:</td>
<td colspan="2" class="diff-lineno">Line 314:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>9.IV. I find this one of the most confusing areas and would certainly welcome the dropping of terms <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage, <del style="font-weight: bold; text-decoration: none;">β</del>-cleavage, etc. because, as your correspondent points out, it can conflict with organic practice. A direct identification of the bond naming the atoms which it joins is far preferable and here present practice in nomenclature would require the use, where possible, of atom numbering, e.g., the C2-C3 bond. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>9.IV. I find this one of the most confusing areas and would certainly welcome the dropping of terms <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage, <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-cleavage, etc. because, as your correspondent points out, it can conflict with organic practice. A direct identification of the bond naming the atoms which it joins is far preferable and here present practice in nomenclature would require the use, where possible, of atom numbering, e.g., the C2-C3 bond. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>One field that appears particularly confusing is the uee of <del style="font-weight: bold; text-decoration: none;">𝛼 </del>and <del style="font-weight: bold; text-decoration: none;">β </del>for the locaation of substituents in rings and for positions of bonds, e.g. (25), we have loss of the <del style="font-weight: bold; text-decoration: none;">𝛼</del>-substituent in alkyl pyrroles but <del style="font-weight: bold; text-decoration: none;">β</del>-cleavage to give loss of a methyl group in ethyl pyrroles (presumably either <del style="font-weight: bold; text-decoration: none;">𝛼 </del>or <del style="font-weight: bold; text-decoration: none;">β </del>ethyl pyrroles), Is <del style="font-weight: bold; text-decoration: none;">β</del>-cleavage <del style="font-weight: bold; text-decoration: none;">β </del>to the ring or the double bond? --certainly not to the hetero atom in <del style="font-weight: bold; text-decoration: none;">β</del>-pyrroles. In other words is loss of a <del style="font-weight: bold; text-decoration: none;">β</del>-substituent <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage? This is, I feel, another reason for dropping the use of Greek letters. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>One field that appears particularly confusing is the uee of <ins style="font-weight: bold; text-decoration: none;">&alpha; </ins>and <ins style="font-weight: bold; text-decoration: none;">&beta; </ins>for the locaation of substituents in rings and for positions of bonds, e.g. (25), we have loss of the <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-substituent in alkyl pyrroles but <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-cleavage to give loss of a methyl group in ethyl pyrroles (presumably either <ins style="font-weight: bold; text-decoration: none;">&alpha; </ins>or <ins style="font-weight: bold; text-decoration: none;">&beta; </ins>ethyl pyrroles), Is <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-cleavage <ins style="font-weight: bold; text-decoration: none;">&beta; </ins>to the ring or the double bond? --certainly not to the hetero atom in <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-pyrroles. In other words is loss of a <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-substituent <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage? This is, I feel, another reason for dropping the use of Greek letters. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>9.V. I think a writer should state "cleavage <del style="font-weight: bold; text-decoration: none;">𝛼</del>, to the ring", or "cleavage <del style="font-weight: bold; text-decoration: none;">β </del>to the carbonyl group", etc. unless he clearly defines his shortened nomenclature. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>9.V. I think a writer should state "cleavage <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>, to the ring", or "cleavage <ins style="font-weight: bold; text-decoration: none;">&beta; </ins>to the carbonyl group", etc. unless he clearly defines his shortened nomenclature. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>9.VI. We feel that to call benzylic cleavage <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage is to open a can of worms. Consider the reaction of alkylbenzenes in which hydrogen is transferred back to the aromatic portion and a section of the chain is lost as an olefin. This has been a cleavage with <del style="font-weight: bold; text-decoration: none;">ɣ </del>hydrogen transfer for years. We cannot break the same bond in benzylic cleavage and call it a cleavage! But if we rename the rearrangement and call it a cleavage with a hydrogen transfer, then the relationship to the common fragmentation of carbonyl compounds, etc., becomes clouded. It seems to us that the least inconsistent approach here is to leave benzylic cleavage as a cleavage, or, as your correspondent suggests, not to give it any Greek letter. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>9.VI. We feel that to call benzylic cleavage <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage is to open a can of worms. Consider the reaction of alkylbenzenes in which hydrogen is transferred back to the aromatic portion and a section of the chain is lost as an olefin. This has been a cleavage with <ins style="font-weight: bold; text-decoration: none;">&gamma; </ins>hydrogen transfer for years. We cannot break the same bond in benzylic cleavage and call it a cleavage! But if we rename the rearrangement and call it a cleavage with a hydrogen transfer, then the relationship to the common fragmentation of carbonyl compounds, etc., becomes clouded. It seems to us that the least inconsistent approach here is to leave benzylic cleavage as a cleavage, or, as your correspondent suggests, not to give it any Greek letter. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To introduce [[acyl cleavage]], [[aroyl cleavage]], and terms like these seems poor since it is not clear whether the acyl fragment is being formed or cleaved in the process described --actually it sounds more like the latter to the uninitiated. We could clear up the matter with new terms--"[[acylogenesis]]" --but this seems unnecessarily cabalistic. Terms like [[alcohol cleavage]], [[ether cleavage]], and so forth are hopelessly vague --and, further, they give no indication whatsoever that the processes are similar. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>To introduce [[acyl cleavage]], [[aroyl cleavage]], and terms like these seems poor since it is not clear whether the acyl fragment is being formed or cleaved in the process described --actually it sounds more like the latter to the uninitiated. We could clear up the matter with new terms--"[[acylogenesis]]" --but this seems unnecessarily cabalistic. Terms like [[alcohol cleavage]], [[ether cleavage]], and so forth are hopelessly vague --and, further, they give no indication whatsoever that the processes are similar. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>9.VII. I agree with one of your correspondents that the definition given by Budzikiewicz et al.(24) is to be amended as follows: <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage is fission of a bond originating at an atom which is adjacent to a heteroatom, etc. " There is an ambiguity possible</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>9.VII. I agree with one of your correspondents that the definition given by Budzikiewicz et al.(24) is to be amended as follows: <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage is fission of a bond originating at an atom which is adjacent to a heteroatom, etc. " There is an ambiguity possible</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>in molecules having more than one heteroatom, and therefore I would suggest to use the term <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage only when the author specifies the original position chosen. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>in molecules having more than one heteroatom, and therefore I would suggest to use the term <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage only when the author specifies the original position chosen. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>As an example, loss of H. from carbon atom 2 in the molecular ion of imidazole can be described as <del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage with respect to both heteroatoms (case A); loss of H. from C-4(5), however is <del style="font-weight: bold; text-decoration: none;">β</del>-cleavage with respect to nitrogen atom 1 and <del style="font-weight: bold; text-decoration: none;">β </del>with respect to nitrogen atom 3 or, if one wishes, <del style="font-weight: bold; text-decoration: none;">𝛼 </del>with respect to N-1 and <del style="font-weight: bold; text-decoration: none;">β </del>with respect to N-3. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>As an example, loss of H. from carbon atom 2 in the molecular ion of imidazole can be described as <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage with respect to both heteroatoms (case A); loss of H. from C-4(5), however is <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-cleavage with respect to nitrogen atom 1 and <ins style="font-weight: bold; text-decoration: none;">&beta; </ins>with respect to nitrogen atom 3 or, if one wishes, <ins style="font-weight: bold; text-decoration: none;">&alpha; </ins>with respect to N-1 and <ins style="font-weight: bold; text-decoration: none;">&beta; </ins>with respect to N-3. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:ASMS 1974 imidazole reaction.jpg|center|500px]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:ASMS 1974 imidazole reaction.jpg|center|500px]]</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>9.X. The terminology in regard to cleavages must conform with the nomenclature of organic chemistry. Photochemists call cleavage of the bond between the carbonyl-carbon atom and the adjacent carbon atom "<del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage". I also can accept the terms "benzyllic" </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>9.X. The terminology in regard to cleavages must conform with the nomenclature of organic chemistry. Photochemists call cleavage of the bond between the carbonyl-carbon atom and the adjacent carbon atom "<ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage". I also can accept the terms "benzyllic" </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>and "allylic" cleavage. For ketones and aldehydes, "<del style="font-weight: bold; text-decoration: none;">𝛼</del>-cleavage" and "[[<del style="font-weight: bold; text-decoration: none;">β</del>-cleavage with <del style="font-weight: bold; text-decoration: none;">β</del>-hydrogen transfer]]" seem to be understandable to organic chemists. For alcohols, </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>and "allylic" cleavage. For ketones and aldehydes, "<ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>-cleavage" and "[[<ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-cleavage with <ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-hydrogen transfer]]" seem to be understandable to organic chemists. For alcohols, </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>amines, etc ., one could say "C-X bond cleavage", <del style="font-weight: bold; text-decoration: none;">𝛼</del>,<del style="font-weight: bold; text-decoration: none;">β</del>-bond cleavage", etc.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>amines, etc ., one could say "C-X bond cleavage", <ins style="font-weight: bold; text-decoration: none;">&alpha;</ins>,<ins style="font-weight: bold; text-decoration: none;">&beta;</ins>-bond cleavage", etc.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Peak, ion, mass.== </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Peak, ion, mass.== </div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20539&oldid=prevKkmurray: /* Recording of solely metastable peaks. */ special character2024-03-10T19:51:11Z<p><span dir="auto"><span class="autocomment">Recording of solely metastable peaks.: </span> special character</span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:51, 10 March 2024</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>a "Scanning in the metastable mode", .. is wide open to criticism, but not as inaccurate as "[[metastable defocusing]]" </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>a "Scanning in the metastable mode", .. is wide open to criticism, but not as inaccurate as "[[metastable defocusing]]" </div></td></tr>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>b See 2b One can now employ the description "e<sub><del style="font-weight: bold; text-decoration: none;">T</del></sub> scanning". </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>b See 2b One can now employ the description "e<sub><ins style="font-weight: bold; text-decoration: none;">&tau;</ins></sub> scanning". </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4.III. Your suggestion of "scanning in the metastable mode" is good. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>4.III. Your suggestion of "scanning in the metastable mode" is good. </div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20538&oldid=prevKkmurray: /* Resolution, resolving power. */ special character2024-03-10T19:49:56Z<p><span dir="auto"><span class="autocomment">Resolution, resolving power.: </span> special character</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:49, 10 March 2024</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Resolution, resolving power.== </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Resolution, resolving power.== </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>These terms, commonly used interchangeably, are usually defined as M/<del style="font-weight: bold; text-decoration: none;">ΔM </del>or <del style="font-weight: bold; text-decoration: none;">ΔM</del>/M at a value of M such that the minimum output signal in the valley between two peaks of equal height equals 10%, or some other specified per cent, of the peak height. On the other hand, the American Vacuum Society's Standards Committee found such a definition inadequate for their needs; Dr. Nerken argues that it is applicable to magnetic instruments only, and is not relevant to quadrupole and time-of-flight instruments. The A.V.S. committee proposes that resolving power at mass M be defined as M/W, the ratio of M to peak width W, and that resolution at mass M be defined as the peak width W at M. For the A.V.S. proposals, see their proposed tentative standard(7). </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>These terms, commonly used interchangeably, are usually defined as M/<ins style="font-weight: bold; text-decoration: none;">&Delta;M </ins>or <ins style="font-weight: bold; text-decoration: none;">&Delta;M</ins>/M at a value of M such that the minimum output signal in the valley between two peaks of equal height equals 10%, or some other specified per cent, of the peak height. On the other hand, the American Vacuum Society's Standards Committee found such a definition inadequate for their needs; Dr. Nerken argues that it is applicable to magnetic instruments only, and is not relevant to quadrupole and time-of-flight instruments. The A.V.S. committee proposes that resolving power at mass M be defined as M/W, the ratio of M to peak width W, and that resolution at mass M be defined as the peak width W at M. For the A.V.S. proposals, see their proposed tentative standard(7). </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>5.I. think there will be always different definitions for different purposes. It might be helpful to give a list which one should be used when and it should be emphasized that the definition used should be specified. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>5.I. think there will be always different definitions for different purposes. It might be helpful to give a list which one should be used when and it should be emphasized that the definition used should be specified. </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'Resolution' is the result obtained under a certain set of circumstances when attempt ing to differentiate between species, while </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'Resolution' is the result obtained under a certain set of circumstances when attempt ing to differentiate between species, while </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>'Resolving Power' is the ability of a system to resolve, or differentiate, between different species. Hence, in mass spectrometry we arrive at the definitions given in the A.V.S. Committee report where "Resolution" is the peak width, W or <del style="font-weight: bold; text-decoration: none;">ΔM</del>, in mass units obtained under the given circumstances and "Resolving Power" is M/<del style="font-weight: bold; text-decoration: none;">ΔM</del>. If <del style="font-weight: bold; text-decoration: none;">ΔM </del>is measured as the intercept drawn at 10% peak height we should obtain resolving powers very similar to the figures quoted (incorrectly) by instrument manufacturers as the "resolution" of their instruments using the 10% valley definition. It would be interesting to hear the comments of instrument makers on this subject. An instrument of high resolving power will give a result of low resolution if it is knocked while scanning! </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>'Resolving Power' is the ability of a system to resolve, or differentiate, between different species. Hence, in mass spectrometry we arrive at the definitions given in the A.V.S. Committee report where "Resolution" is the peak width, W or <ins style="font-weight: bold; text-decoration: none;">&Delta;M</ins>, in mass units obtained under the given circumstances and "Resolving Power" is M/<ins style="font-weight: bold; text-decoration: none;">&Delta;M</ins>. If <ins style="font-weight: bold; text-decoration: none;">&Delta;M </ins>is measured as the intercept drawn at 10% peak height we should obtain resolving powers very similar to the figures quoted (incorrectly) by instrument manufacturers as the "resolution" of their instruments using the 10% valley definition. It would be interesting to hear the comments of instrument makers on this subject. An instrument of high resolving power will give a result of low resolution if it is knocked while scanning! </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>5.V. The A.V.S. proposal, paragraph 3.16.4, suggests "<del style="font-weight: bold; text-decoration: none;">esolving </del>Power =M/W =M/<del style="font-weight: bold; text-decoration: none;">ΔM</del>" and paragraph 4.2.1 has one measure W or <del style="font-weight: bold; text-decoration: none;">ΔM </del>at lO% of the peak height. So, I see no major differences between their definition and the 10% valley definition except verbosity and the use of equations and figures. Let's stay with the simple stated definition. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>5.V. The A.V.S. proposal, paragraph 3.16.4, suggests "<ins style="font-weight: bold; text-decoration: none;">resolving </ins>Power = M/W = M/<ins style="font-weight: bold; text-decoration: none;">&Delta;M</ins>" and paragraph 4.2.1 has one measure W or <ins style="font-weight: bold; text-decoration: none;">&Delta;M </ins>at lO% of the peak height. So, I see no major differences between their definition and the 10% valley definition except verbosity and the use of equations and figures. Let's stay with the simple stated definition. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>----</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>5 and 6.VI. We think that any working definition of resolution and sensitivity will </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>5 and 6.VI. We think that any working definition of resolution and sensitivity will </div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20536&oldid=prevKkmurray: /* Some thoughts on nomenclature in the field of metastable ions and some suggestions of terms to be encouraged and of others to be discouraged. */2024-03-09T20:48:41Z<p><span dir="auto"><span class="autocomment">Some thoughts on nomenclature in the field of metastable ions and some suggestions of terms to be encouraged and of others to be discouraged.</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:48, 9 March 2024</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l464">Line 464:</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>e. The term ''metastable peak'' has been used for a long time and I suggest that the use of this as an acceptable shorthand should be confirmed, quotation marks no longer being required. The term ''metastable'' (used as a noun) could be used interchangeably with ''metastable peak''. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>e. The term ''metastable peak'' has been used for a long time and I suggest that the use of this as an acceptable shorthand should be confirmed, quotation marks no longer being required. The term ''metastable'' (used as a noun) could be used interchangeably with ''metastable peak''. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>f. For transitions in which the neutral fragment is represented, or in the general case in which there are two daughters of the transition, the term 'm''<sub>3</sub> should be used for the second daughter. This would be so in cases such as: </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>f. For transitions in which the neutral fragment is represented, or in the general case in which there are two daughters of the transition, the term <ins style="font-weight: bold; text-decoration: none;">'</ins>'m''<sub>3</sub> should be used for the second daughter. This would be so in cases such as: </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">::m<sub>1</sub><sup>+</sup> -> m<sub>2</sub><sup>+</sup> + m<sub>3</sub></ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>or</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>or</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">::m<sub>1</sub><sup>++</sup> -> m<sub>2</sub><sup>+</sup> + m<sub>3</sub><sup>+</sup></ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>All of this would help to establish an easy understanding of the mathematical equations used in this field. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>All of this would help to establish an easy understanding of the mathematical equations used in this field. </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1. When a collision gas is used to promote ionic reactions, we speak of "collision-induced dissociations" or CID's. The peaks resulting from CID's should be called "CID peaks." Although their position on the mass scale is very close to the position at </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>1. When a collision gas is used to promote ionic reactions, we speak of "collision-induced dissociations" or CID's. The peaks resulting from CID's should be called "CID peaks." Although their position on the mass scale is very close to the position at </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>which metastable peaks appear, they should not be, called "[[collision-induced <del style="font-weight: bold; text-decoration: none;">metastables</del>]]." </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>which metastable peaks appear, they should not be, called "[[collision-induced <ins style="font-weight: bold; text-decoration: none;">metastable</ins>]]<ins style="font-weight: bold; text-decoration: none;">s</ins>." </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>m. Various names are used to describe reactions in which charges are transferred when a collision gas is introduced. Thus the processes </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>m. Various names are used to describe reactions in which charges are transferred when a collision gas is introduced. Thus the processes </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">::X<sup>++</sup> + Y -> X<sup>+</sup> + Y<sup>+</sup></ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>or </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>or </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">::X<sup>+++</sup> + Y -> X<sup>++</sup> + Y<sup>+</sup></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">would be called "[[charge exchange]]" or "[[ionization of the collision gas by the ion beam]]" </ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">would be called "charge exchange" or "ionization of the collision gas by the ion beam" </del>Reactions such as: </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Reactions such as: </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">::X<sup>+</sup> + Y -> X<sup>++</sup> + Y + e</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>or </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>or </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">::X<sup>+</sup> + Y -> X<sup>++</sup> + Y<sup>+</sup> + 2e</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>are called "[[charge stripping]]". </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>are called "[[charge stripping]]". </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>n. There are a number of symbols that we are currently using. We hope that they will turn out to be those adopted as standard, but in any event, some of them are: </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>n. There are a number of symbols that we are currently using. We hope that they will turn out to be those adopted as standard, but in any event, some of them are: </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::<del style="font-weight: bold; text-decoration: none;">e0 </del>Activation energy </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::<ins style="font-weight: bold; text-decoration: none;">ε<sub>0</sub> = [[</ins>Activation energy<ins style="font-weight: bold; text-decoration: none;">]] </ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::<del style="font-weight: bold; text-decoration: none;">e: </del>Reverse activation energy </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::<ins style="font-weight: bold; text-decoration: none;">ε<sup>r</sup><sub>0</sub> = [[</ins>Reverse activation energy<ins style="font-weight: bold; text-decoration: none;">]] </ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::<del style="font-weight: bold; text-decoration: none;">e </del>= Non-fixed or internal energy of the reactant ion </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::<ins style="font-weight: bold; text-decoration: none;">ε<sup>‡</sup> </ins>= Non-fixed or internal energy of the reactant ion </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::c* Non-fixed or internal energy of the activated complex. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::c* <ins style="font-weight: bold; text-decoration: none;">= </ins>Non-fixed or internal energy of the activated complex. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::T Kinetic energy released in a reaction </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::T <ins style="font-weight: bold; text-decoration: none;">= </ins>Kinetic energy released in a reaction </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::Q Kinetic energy converted to internal energy in a collision </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::Q <ins style="font-weight: bold; text-decoration: none;">= </ins>Kinetic energy converted to internal energy in a collision </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>::Q' Kinetic energy lost by an ion in a collision. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>::Q' <ins style="font-weight: bold; text-decoration: none;">= </ins>Kinetic energy lost by an ion in a collision. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>o. As a post-script may I say that we are strongly in favor of the use of a dot to indicate an odd electron, of M<sup>+</sup> for a molecular ion and of P<sup>+</sup> as the symbol for a parent ion (i.e. the parent, as opposed to the daughter for any reaction, not just those involving the molecular ion).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>o. As a post-script may I say that we are strongly in favor of the use of a dot to indicate an odd electron, of M<sup>+</sup> for a molecular ion and of P<sup>+</sup> as the symbol for a parent ion (i.e. the parent, as opposed to the daughter for any reaction, not just those involving the molecular ion).</div></td></tr>
</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20535&oldid=prevKkmurray: /* 14. Terms pertinent to instrument performance specifications. */2024-03-09T20:38:13Z<p><span dir="auto"><span class="autocomment">14. Terms pertinent to instrument performance specifications.</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:38, 9 March 2024</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l519">Line 519:</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>o. As a post-script may I say that we are strongly in favor of the use of a dot to indicate an odd electron, of M<sup>+</sup> for a molecular ion and of P<sup>+</sup> as the symbol for a parent ion (i.e. the parent, as opposed to the daughter for any reaction, not just those involving the molecular ion).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>o. As a post-script may I say that we are strongly in favor of the use of a dot to indicate an odd electron, of M<sup>+</sup> for a molecular ion and of P<sup>+</sup> as the symbol for a parent ion (i.e. the parent, as opposed to the daughter for any reaction, not just those involving the molecular ion).</div></td></tr>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==<del style="font-weight: bold; text-decoration: none;">14. </del>Terms pertinent to instrument performance specifications. ==</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==Terms pertinent to instrument performance specifications. ==</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>a. [[Mass range ]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>a. [[Mass range ]]</div></td></tr>
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</table>Kkmurrayhttps://kermitmurray.com/msterms/index.php?title=ASMS_1974&diff=20532&oldid=prevKkmurray at 03:29, 9 March 20242024-03-09T03:29:00Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 23:29, 8 March 2024</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>7.X. I too don't approve of the use of name reactions. It may be too late to prevent further misuse of the term "McLafferty rearrangement"! It certainly would help if Djerassi stopped using the term. You don't give your opinions of "[[Nier geometry]]" , "[[Mattauch-Herzog geometry]]", etc. A novice could spend a lifetime finding the meanings of some terms of this type.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>7.X. I too don't approve of the use of name reactions. It may be too late to prevent further misuse of the term "McLafferty rearrangement"! It certainly would help if Djerassi stopped using the term. You don't give your opinions of "[[Nier geometry]]" , "[[Mattauch-Herzog geometry]]", etc. A novice could spend a lifetime finding the meanings of some terms of this type.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==Presentation of spectra<del style="font-weight: bold; text-decoration: none;">. </del>==</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>==Presentation of spectra ==</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Until some ten years ago, mass spectra were nearly always reported in tabular form. Since then, bar-chart presentation has come into wide favor. Each of these modes has advantages and disadvantages, and which is preferable depends on the kind of information an author is trying to convey, the point he is trying to make. This choice deserves more attention than it has had from the authors of much recent literature and, of course, from editors and referees. On the other hand, some authors have, within the past few years, taken to reporting mass spectra in paragraph form. I would suggest that this practice is an abomination. The reader can do nothing with such data without first transcribing them to some other format. I would like to see us do whatever we can to discourage such a practice. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Until some ten years ago, mass spectra were nearly always reported in tabular form. Since then, bar-chart presentation has come into wide favor. Each of these modes has advantages and disadvantages, and which is preferable depends on the kind of information an author is trying to convey, the point he is trying to make. This choice deserves more attention than it has had from the authors of much recent literature and, of course, from editors and referees. On the other hand, some authors have, within the past few years, taken to reporting mass spectra in paragraph form. I would suggest that this practice is an abomination. The reader can do nothing with such data without first transcribing them to some other format. I would like to see us do whatever we can to discourage such a practice. </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Peak, ion, mass.== </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Peak, ion, mass.== </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The current literature furnishes a growing number of horrible examples of <del style="font-weight: bold; text-decoration: none;">tl1e </del>completely interchangeable <del style="font-weight: bold; text-decoration: none;">usc </del>of the words <del style="font-weight: bold; text-decoration: none;">''</del>peak,<del style="font-weight: bold; text-decoration: none;">'' </del>"ion," and even "mass." One might have hoped that editors and referees would have discouraged such a loose practice. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The current literature furnishes a growing number of horrible examples of <ins style="font-weight: bold; text-decoration: none;">the </ins>completely interchangeable <ins style="font-weight: bold; text-decoration: none;">use </ins>of the words <ins style="font-weight: bold; text-decoration: none;">"[[</ins>peak<ins style="font-weight: bold; text-decoration: none;">]]</ins>," <ins style="font-weight: bold; text-decoration: none;">"[[</ins>ion<ins style="font-weight: bold; text-decoration: none;">]]</ins>," and even "<ins style="font-weight: bold; text-decoration: none;">[[</ins>mass<ins style="font-weight: bold; text-decoration: none;">]]</ins>." One might have hoped that editors and referees would have discouraged such a loose practice. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">JO</del>.I. Agree. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">JO</del>. II. Agreed. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">10</ins>.I. Agree. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">IO</del>.III. Agree-<del style="font-weight: bold; text-decoration: none;">~</del>the clear usage of terms is, however, the primary responsibility of the author, and secondarily the referee. I have had bad experiences when editors assume the responsibility of changing technical terms in a <del style="font-weight: bold; text-decoration: none;">p.1per</del>. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">IO</del>.IV. It is up to editors and referees to correct the misuse of peak, ion and mass. The correct usages are fairly obvious. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">10</ins>.II. Agreed. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">10</ins>.III. Agree -<ins style="font-weight: bold; text-decoration: none;">- </ins>the clear usage of terms is, however, the primary responsibility of the author, and secondarily the referee. I have had bad experiences when editors assume the responsibility of changing technical terms in a <ins style="font-weight: bold; text-decoration: none;">paper</ins>. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">10</ins>.IV. It is up to editors and referees to correct the misuse of peak, ion and mass. The correct usages are fairly obvious. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>10.V. I favor clear, unambiguous terms, but most writers avoid repetition like the plague, leading to undesirable interchanges. Understanding by the reader should be the aim of expository writing. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>10.V. I favor clear, unambiguous terms, but most writers avoid repetition like the plague, leading to undesirable interchanges. Understanding by the reader should be the aim of expository writing. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==<del style="font-weight: bold; text-decoration: none;">11. </del>Molecular, molecule, and parent ion and peak<del style="font-weight: bold; text-decoration: none;">.</del>== </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>== Molecular, molecule, and parent ion and peak== </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>"[[Molecule-ion]] can perhaps be discarded out-of-hand in view of the similarity to "[[ion-molecule]]," an adjective describing a reaction between an ion and a neutral molecule. "Parent" may denote either the ion formed by loss of one (or more than one, if stated explicitly) electron from the original molecule -- precisely the definition of "molecular ion 11 in the O.M.S. Editorial Review on Nomenclature(26) -- or the decomposing ion in any reaction step under consideration, in which the charge-retaining product is referred to as a "daughter ion." The possible ambiguity has evidently caused some concern. On the other hand, the meaning is usually clear from the context. How serious a problem is this? </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>"[[Molecule-ion]] can perhaps be discarded out-of-hand in view of the similarity to "[[ion-molecule]]," an adjective describing a reaction between an ion and a neutral molecule. "Parent" may denote either the ion formed by loss of one (or more than one, if stated explicitly) electron from the original molecule -- precisely the definition of "molecular ion 11 in the O.M.S. Editorial Review on Nomenclature(26) -- or the decomposing ion in any reaction step under consideration, in which the charge-retaining product is referred to as a "daughter ion." The possible ambiguity has evidently caused some concern. On the other hand, the meaning is usually clear from the context. How serious a problem is this? </div></td></tr>
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</table>Kkmurray