Field desorption: Difference between revisions

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This term is used to describe the formation of ions in the gas phase from a material deposited on a solid surface (known as an emitter) in the presence of an electric field. As this process probably encompasses ionization by [[field ionization]] as well as other mechanisms of ionization the term ''field desorption'' is not a precise one, despite its widespread acceptance.
This term is used to describe the formation of ions in the gas phase from a material deposited on a solid surface (known as an emitter) in the presence of an electric field. As this process probably encompasses ionization by [[field ionization]] as well as other mechanisms of ionization the term ''field desorption'' is not a precise one, despite its widespread acceptance.
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== Gold Book entry ==
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http://goldbook.iupac.org/F02357.html
A term used to describe the formation of ions in the gas phase from a material deposited on a solid surface (known as an 'emitter') in the presence of a high electrical field. 'Field desorption' is an ambiguous term because it implies that the electric field desorbs a material as an ion from some kind of emitter on which the material is deposited. There is growing evidence that some of the ions formed are due to thermal ionization and some to field ionization of vapour evaporated from material on the emitter. Because there is generally little or no ionization unless the emitter is heated by an electric current, 'field desorption' is a misnomer. The term is, however, firmly implanted in the literature and most users undertand what is going on regardless of the implications of the term. In addition, no better simple term has been suggested to take its place and so, reluctantly, it is recommended that it be retained.
'''Source''': PAC, 1991, 63, 1541 ([[Recommendations for nomenclature and symbolism for mass spectroscopy]] (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1547
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Revision as of 22:45, 15 July 2009

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Orange Book entry

Orange Book

ORANGE BOOK DEFINITION

IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979 (see also Orange Book 2023)

Field desorption

This term is used to describe the formation of ions in the gas phase from a material deposited on a solid surface (known as an emitter) in the presence of an electric field. As this process probably encompasses ionization by field ionization as well as other mechanisms of ionization the term field desorption is not a precise one, despite its widespread acceptance.

IUPAC 1997 Orange Book Chapter 12
Index of Orange Book Terms


Gold Book entry

Gold Book

GOLD BOOK DEFINITION

IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997).

Field desorption

http://goldbook.iupac.org/F02357.html

A term used to describe the formation of ions in the gas phase from a material deposited on a solid surface (known as an 'emitter') in the presence of a high electrical field. 'Field desorption' is an ambiguous term because it implies that the electric field desorbs a material as an ion from some kind of emitter on which the material is deposited. There is growing evidence that some of the ions formed are due to thermal ionization and some to field ionization of vapour evaporated from material on the emitter. Because there is generally little or no ionization unless the emitter is heated by an electric current, 'field desorption' is a misnomer. The term is, however, firmly implanted in the literature and most users undertand what is going on regardless of the implications of the term. In addition, no better simple term has been suggested to take its place and so, reluctantly, it is recommended that it be retained.

Source: PAC, 1991, 63, 1541 (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1547

IUPAC Gold Book
Index of Gold Book Terms


External links