Discrimination between pentose oligosaccharides containing<scp>D</scp>-xylopyranose or<scp>L</scp>-arabinofuranose as non-reducing terminal residue using fast atom bombardment mass spectrometry
作者:Vladimír Kováčik、Vladimír Pätoprstý、Ján Hirsch
DOI:10.1002/jms.138
日期:2001.4
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 (0,2Xt/1,5Xt) in the high-energy CID spectra of the sodium-cationized di-, tri- and probably also tetrasaccharide compounds. Copyright © 2001 John Wiley & Sons, Ltd.
在快速原子轰击条件下,一些甲基糖苷二糖、三糖和四糖(在非还原末端含有D-木糖吡喃糖基和/或L-阿拉伯呋喃糖基残基)的[M + H]+和[M − H]−离子的碰撞诱导解离(CID)质谱不能提供有关其环尺寸的信息。 只有通过仔细比较钠阳离子化二糖、三糖和可能还有四糖化合物的高能CID光谱中[M + Na − 90]+和[M + Na − 104]+离子的强度比(0.2Xt/1.5Xt),才能获得这些信息。 版权所有 © 2001 John Wiley & Sons, Ltd.