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Odd‐electron molecular ion and loss of toluene in fast atom bombardment mass spectra of some carotenoids
Author(s) -
Caccamese Salvatore,
Garozzo Domenico
Publication year - 1990
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210250303
Subject(s) - fast atom bombardment , fragmentation (computing) , toluene , mass spectrum , ion , chemistry , mass spectrometry , atom (system on chip) , polyatomic ion , electron ionization , spectral line , ionic bonding , photochemistry , analytical chemistry (journal) , organic chemistry , ionization , chromatography , physics , astronomy , computer science , embedded system , operating system
Positive‐ion fast atom bombardment (FAB) and B/E linked scan FAB mass spectra of seven carotenoids are reported. In all cases the M +· ions are observed, and the [M + H] + ions are absent in the hydrocarbons and weak in the oxygenated compounds. The usefulness of B/E linked scan FAB mass spectra to distinguish isomers and to attribute the loss of toluene from the M +· to an ionic fragmentation and not to a thermal process is discussed.