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Collision‐Induced decomposition of peptides. An investigation into the effect of collision gas pressure on translational energy losses
Author(s) -
Bradley Caroline D.,
Derrick Peter J.
Publication year - 1991
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.1210260507
Subject(s) - ion , collision , kinetic energy , atomic physics , helium , translational energy , chemistry , mass spectrum , helium gas , collision induced dissociation , spectral line , gas pressure , decomposition , valinomycin , mass spectrometry , physics , tandem mass spectrometry , computer security , organic chemistry , quantum mechanics , chromatography , astronomy , computer science , petroleum engineering , engineering
Abstract The dependence on the gas pressure of translational energy losses, Δ E , suffered by incident ions in collision with helium target gas atoms was investigated for the [M + Na] + ion of valinomycin. Δ E was measured from the fragment ion peak positions in the mass‐analysed ion kinetic energy (MIKE) spectra. The variation of Δ E with target gas pressure was found to be different for different fragment ions. The implications of the results for the number of collisions which may occur under normal collision‐induced decomposition conditions (30–40% transmission) are discussed.