Principal ion: Difference between revisions

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The most abundant ion of an isotope cluster, such as the <sup>11</sup>B<sup>79</sup>Br<sub>2</sub><sup>81</sup>Br<sup>+.</sup> ion of ''m/z'' 250 of the isotope cluster of molecular ions of BBr<sub>3</sub>. The term principal ion has also been used to describe ions that have been artificially isotopically enriched in one or more positions such as CH<sub>3</sub> <sup>13</sup>CH<sub>3</sub> or CH<sub>2</sub>D<sub>2</sub>.  
 
 
== [[Orange Book]] Entry ==
 
This is defined as a {{Molecular Ion|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 CH<sub>3</sub> <sup>13</sup>CH<sub>3</sub> or CH<sub>2</sub>D<sub>2</sub> 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.


[[Category:Ions]]
[[Category:Ions]]

Revision as of 16:19, 4 February 2005

The most abundant ion of an isotope cluster, such as the 11B79Br281Br+. ion of m/z 250 of the isotope cluster of molecular ions of BBr3. The term principal ion has also been used to describe ions that have been artificially isotopically enriched in one or more positions such as CH3 13CH3 or CH2D2.

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