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J Mass Spectrom. 2000 Aug;35(8):1042-8.

Sequencing of oligosaccharides by collision-induced dissociation matrix-assisted laser desorption/ionization mass spectrometry.

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  • 1Istituto per la Chimica e la Tecnologia dei Materiali Polimerici, Viale A. Doria 6, 95125 Catania, Italy.


A study of the collision-induced dissociation post-source decay (PSD) spectra of free oligosaccharides is presented. These spectra, when obtained with helium as collision gas, show (1,5)X fragments containing the reducing end sugar. The presence of these fragments permits Y ions and, consequently, B and C peaks to be identified. This is a common behaviour from which it has been possible to delineate a general method for the easy assignment of the peaks in PSD spectra of underivatized neutral sugars, allowing the sequence of a real unknown to be obtained.

Copyright 2000 John Wiley & Sons, Ltd.

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