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Metastable Ion Kinetic Energy and Collision-Induced Dissociation Study of Per-O-acetylated D-Trehaloses under the Conditions of Electron Impact and Chemical Ionization Mass Spectrometry

V. Pätoprstá, V. Kováčik, and Š. Kučár

Institute of Chemistry, Slovak Academy of Sciences, CS-842 38 Bratislava


Abstract: Selected ions obtained by electron impact (at 70 and 12 eV energy) and chemical ionization (isobutane, ammonia, and methylamine) of per-O-acetylated D-trehaloses have been examined by metastable ion kinetic energy (MIKE) and collision-induced dissociation (CID) mass spectrometry. The predominant process of the fragmentation of molecular and quasimolecular ions is the cleavage of glycosidic linkages. The MIKE and CID spectra of the ions produced, as well as the spectra of the [M + NH4]+ and [M + CH3NH3]+ cluster ions prove that α- and/or β-configuration of D-trehaloses does not have any influence on the fragmentation pathways.

Full paper in Portable Document Format: 472a122.pdf


Chemical Papers 47 (2) 122–124 (1993)

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