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Discrimination between pentose oligosaccharides containing D -xylopyranose or L -arabinofuranose as non-reducing terminal residue using fast atom bombardment mass spectrometry

2001; Wiley; Volume: 36; Issue: 4 Linguagem: Inglês

10.1002/jms.138

1096-9888

Vladimı́r Kováčik, Vladimı́r Pätoprstý, Ján Hirsch,

Carbohydrate Chemistry and Synthesis

Abstract Collisional‐induced dissociation (CID) mass spectra of the [M + H] + and [M − H] − ions obtained under fast atom bombardment conditions of a number of methyl glycoside di‐, tri‐ and tetrasaccharides, containing D ‐xylopyranosyl and/or L ‐arabinofuranosyl residues at the non‐reducing terminus, do not provide information about their ring size. This information could only be obtained from a careful comparison of the intensity ratio of the [M + Na − 90] + and [M + Na − 104] + ions ( 0,2 X t / 1,5 X t ) in the high‐energy CID spectra of the sodium‐cationized di‐, tri‐ and probably also tetrasaccharide compounds. Copyright © 2001 John Wiley & Sons, Ltd.