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Z ‐discrimination avoidance in mass‐analysed ion kinetic energy spectral studies performed on an unmodified ZAB‐E mass spectrometer
Author(s) -
Reid Colin J.
Publication year - 1989
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.1210240608
Subject(s) - kinetic energy , ion , metastability , mass spectrometry , chemistry , atomic physics , mass spectrum , analytical chemistry (journal) , deflection (physics) , spectrometer , beam (structure) , spectral line , ion beam , physics , optics , organic chemistry , chromatography , quantum mechanics , astronomy
A method is introduced by which mass‐analysed ion kinetic energy spectra free from Z ‐discrimination can be obtained for both collisionally activated (CA) and metastable decomposition reactions. The method, performed on a ZAB‐E instrument fitted with a collision cell, but applicable also to the ZAB‐2F, involves summation of the ‘height resolved’ contributions (formed by beam collimation in the Z ‐axis and selected by electrostatic deflection of the incident beam) using the signal averaging facility normally available. Representative results (at 8 or 10 keV energy) are given for the CA (Ar target) reactions [CS 2 ] 2+ → [CS] + ; [CS 2 ] + → S + and [CH 3 OH] + → [ m / z = 12–31] + , and for the metastable reaction [ m / z 45] + → [ m / z 29] + in ethanol.