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Dimethyl ether chemical ionization mass spectrometry

✍ Scribed by Elizabeth P. Burrows

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
763 KB
Volume
14
Category
Article
ISSN
0277-7037

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✦ Synopsis

Abstract

The uses of dimethyl ether (DME) as an unusual positive ion reagent for chemical ionization mass spectrometry (CIMS) are reviewed. The fragment–molecule adducts formed by ion–molecule reactions of organic substrates with the ionized gas are highly characteristic for the substrates and frequently can be used to differentiate among isomers. The fragmentation mechanisms of the adducts have been studied by collision‐induced dissociation and with deuterium labeling, and, in some cases, are well‐understood. DME CIMS has been applied to a wide variety of classes of organic compounds, including substituted aromatics, amino alcohols, lactones, lactams, polyethylene glycols, benzodiazepines, azepines, trichothecenes, and certain alkaloids, nucleoside antibiotics, and polynuclear aromatic hydrocarbons. © 1996 John Wiley & Sons, Inc.

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