The effect of changes in gas pressure on collision-induced fragmentations of benzoyl ions

Abstract

It is shown that more intense fragment ion currents can be obtained from collision-induced decompositions at lower collision gas pressures than are normally used. The applications of these collision-induced decompositions are re-evaluated at these lower pressures. Differences in collision-induced spectra which are observed are attributed to different internal energy distributions in the fragmenting ions. A novel technique of measuring appearance energies of fragment ions from a single precursor ion by variation of the collision gas pressure is described.