Journal
CARBOHYDRATE RESEARCH
Volume 342, Issue 17, Pages 2567-2574Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2007.08.002
Keywords
N-acylated glycosylamines; N,O-acylated glycosylamines; UV-MALDI-TOF-MS; PSD UV-MALDI-TOF-MS
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Matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF-MS) has shown to be a very useful technique for the study of the non-volatile and thermally non-stable N-acylated glycopyranosyl- and glycofuranosyl-amines.Of the several matrices tested, 2,5-dihydroxybenzoic acid (DHB) was the most effective giving good spectra in the positive-ion mode. In the linear and reflectron modes, the [M+Na](+) ions appeared with high intensity. Their fragmentation patterns were investigated by post-source decay (PSD) UV-MALDI-TOF-MS showing mainly cross-ring cleavages. In addition, N,O-acylated glycopyranosyl- and glycofuranosyl-amines were also analyzed by this technique. PSD UV-MALDI-TOF-MS gave significant signals for several primary fragment ions, which were proposed but not detected, or observed with very low abundance, in electron ionization mass spectrometry (EI-MS) experiments. (c) 2007 Elsevier Ltd. All rights reserved.
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