Z-discrimination avoidance in mass-analysed ion kinetic energy spectral studies performed on an unmodified ZAB-E mass spectrometer.

Autor:	Reid, Colin J.
Zdroj:	Organic Mass Spectrometry; 1989, Vol. 24 Issue 6, p405-408, 4p
Abstrakt:	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 [CS2]2+ → [CS]+; [CS2]+ → S+ and [CH3OH]+ → [ m/ z = 12-31]+, and for the metastable reaction [ m/ z 45]+ → [ m/ z 29]+ in ethanol. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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