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Energy‐resolved collisional activation of dimethyl phosphonate and dimethyl phosphite ions in a quadrupole ion trap and a triple quadrupole mass spectrometer
Author(s) -
Brodbelt Jennifer S.,
Kenttämaa Hilkka I.,
Cooks R. Graham
Publication year - 1988
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.1210230103
Subject(s) - triple quadrupole mass spectrometer , ion trap , quadrupole ion trap , mass spectrometry , chemistry , ion , quadrupole , hybrid mass spectrometer , atomic physics , quadrupole mass analyzer , analytical chemistry (journal) , mass spectrum , spectrometer , selected reaction monitoring , physics , tandem mass spectrometry , optics , organic chemistry , chromatography
Collision‐activated dissociation spectra of dimethyl phosphonate and dimethyl phosphite ions were measured as a function of the amplitude of a supplementary AC voltage applied across the end‐caps of an ion‐trap mass spectrometer. These spectra yield breakdown graphs which bear a close resemblance to those obtained by varying collision energy in a triple‐quadrupole mass spectrometer operating under multiple‐collision conditions. Variation in the time of excitation at the resonance frequency provides an alternative route to breakdown graphs. The results demonstrate that energy deposition occurs via multiple activating collisions in the ion trap. Maximum energy deposition observed is somewhat smaller under normal operating conditions in the ion trap than in the triple‐quadrupole mass spectrometer.