By Urs P. Schlunegger
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Extra info for Advanced Mass Spectrometry. Applications in Organic and Analytical Chemistry
Nowadays, several papers appear every month dealing with "metastable studies" in addition to a large number of studies in which methods for single analysis are applied. The following examples show only a selection of examples which illustrate the large field of applications for the detection of the origin and fate of ions. Some of the applications for the detection of fragment genesis will be discussed below in detail. 1 Detection of Fragmentation Pathways One of the most obvious problems which can be solved - at least in a much shorter time than by conventional mass spectrometry is the elucidation of fragmentation pathways by detecting the fragment origins.
It was taken for granted that all ions would be monoenergetic. This is correct for conventional spectrometry, where all efforts are made to apply the kinetic energy Wkin eV with a minimum spread to all ions possible. This criterion can serve as a starting point for the detection of fragment genesis because it is possible to accept that all ions leaving the ion source are monoenergetic in the first approximation. Yet an ion, generated from another source after leaving the acceleration field (ion source), will contain only one part of the original kinetic ion energy, relative to the smaller mass 0 β + - W.
16 (Varian MAT CH5-DF). 41 Hardware 42 the product ions, so that the product ion m£ still has the energy: This is why the field strength of the electric sector must also be diminished by a factor of f = m^^L to enable the product ion m to pass the electric energy filter (electric sector). If all product ions m ^ generated from a precursor in the first field-free region of a mass spectrometer, are to be focused in succession on the detector, the magnetic as well as the electric sector have to be changed continually, and in related manner.
Advanced Mass Spectrometry. Applications in Organic and Analytical Chemistry by Urs P. Schlunegger