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Internal energy effects in collision induced dissociation spectra
Author(s) -
van Koppen Petra A. M.,
Illies Andreas J.,
Liu Shuying,
Bowers Michael T.
Publication year - 1982
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.1210170902
Subject(s) - dissociation (chemistry) , fragmentation (computing) , ion , internal energy , collision induced dissociation , chemistry , excited state , ionization , atomic physics , mass spectrum , mass spectrometry , collision , spectral line , ion source , chemical ionization , analytical chemistry (journal) , tandem mass spectrometry , physics , chromatography , thermodynamics , computer security , organic chemistry , astronomy , computer science , operating system
The effect of the precursor ion internal energy on the branching ratios obtained from collision induced dissociation fragmentation patterns was examined for [NH 3 ] + and [C 2 H 4 N] + . The ion internal energy was changed by varying both the chemical ionization reagent gas and the ion source pressure. Effects observed in the collision induced dissociation fragmentation patterns as a function of the ion source pressure are explained by the reaction exothermicities and by collisional deactivation of internally excited ions (at high pressure).