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Instrument‐independent database for collisionally activated dissociation in RF‐only quadrupoles. The case of C 2 H 3 O + and C 3 H 7 +
Author(s) -
Martinez Richard I.,
Ganguli B.
Publication year - 1989
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290031102
Subject(s) - chemistry , analytical chemistry (journal) , dissociation (chemistry) , mass spectrometry , ion , collision induced dissociation , tandem mass spectrometry , tandem , quadrupole , branching (polymer chemistry) , ethylene , atomic physics , physics , materials science , organic chemistry , chromatography , composite material , catalysis , biochemistry
Abstract Dynamically correct (i.e., instrument‐independent) branching ratios can be measured under single‐collision conditions in tandem mass spectrometers incorporating RF‐only quadrupole collision cells. The absolute branching ratios were measured as a function of the center‐of‐mass interaction energy E CM for the collisionally activated dissociation (CAD) of CH 3 CO + (m/z43) from several source compounds (ethanol, oxirane), and CH 3 CO‐X (where X = H, CH 3 , CH 3 CH 2 , CH 3 CO, CH 3 COCH 2 , and C 6 H 5 )). The energy dependences of the branching ratios for C 2 H 3 O + from CH 3 CO‐X source compounds are quite distinct from those observed for C 2 H 3 O + from ethanol or ethylene oxide, or for the C 3 H + 7 ions (also m / z 43) from n ‐pentane. Hence, one can use the CAD of m / z 43 to distinguish CH 3 CO‐X compounds from other source compounds, including sources of C 3 H 7 + ions. Therefore, the characteristic branching ratios of ionic substructures may provide for tandem mass spectrometry a „fingerprinting” capability analogous to the use of group frequencies in infrared spectroscopy.