fragment ion

in mass spectrometry
https://doi.org/10.1351/goldbook.F02508
An electrically charged @D01801@ product of an ionic @F02506@. Such an ion may dissociate further to form other electrically charged molecular or atomic moieties of successively lower formula @W06668@.
See also:
daughter ion
Sources:
Orange Book, 2nd ed., p. 205 [Terms]
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2190 [Terms] [Paper]
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 1549 [Terms] [Paper]