Principal ion: Difference between revisions
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{{DefName|The most abundant ion of | {{DefName| | ||
The most abundant ion of a group of [[isotopologue ion]]s. For example, <sup>11</sup>B<sup>79</sup>Br<sub>2</sub><sup>81</sup>Br<sup>+.</sup> is the principal ion of BBr<sub>3</sub><sup>+</sup>. | |||
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== [[Orange Book]] Entry == | == [[Orange Book]] Entry == |
Revision as of 15:05, 25 December 2005
DRAFT DEFINITION |
Principal ion |
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The most abundant ion of a group of isotopologue ions. For example, 11B79Br281Br+. is the principal ion of BBr3+. |
Considered between 2004 and 2006 but not included in the 2006 PAC submission |
This is an unofficial draft definition presented for information and comment. |
Orange Book Entry
This is defined as a molecular or fragment ion which is made up of the most abundant isotopes of each of its atomic constituents. In the case of compounds that have been artificially enriched in one or more positions such as CH3 13CH3 or CH2D2 the principal ion may be defined by treating the heavy isotopes as new atomic species. Thus in the two above example the principal ions would be of masses 13 and 18, respectively.