End-group determination of oligosaccharides: a gas chromatography–mass spectrometry/mass spectrometry method for distinguishing between all d-aldohexoses and d-ketohexoses
作者:Brad Bendiak、Tammy T. Fang
DOI:10.1016/s0008-6215(00)00058-6
日期:2000.8
derivatives on single columns by gas chromatography. Gas chromatography-mass spectrometry/mass spectrometry with electron-impact ionization enabled the 1-deoxy-1-hydrazinohexitol heptaacetates and 2-deoxy-2-hydrazinohexitol heptaacetates to be independently identified in each others presence. Chemical-ionization mass spectrometry/mass spectrometry permitted derivatives to be identified in subpicomolar quantities
描述了用于寡糖的端基测定的方法,该方法包括将还原性单糖转化成1-脱氧-1-肼基己糖醇七乙酸酯(醛糖己糖)或2-脱氧-2-肼基己糖醇七乙酸酯的差向异构体对(2-酮己糖糖)。 。产品是线性的,对于每种醛己糖或酮己糖来说都是唯一的。报道了通过气相色谱法在单个柱上分离衍生物的所有立体异构体的方法。带有电子轰击电离的气相色谱-质谱/质谱可以使1-脱氧-1-肼基己糖醇七乙酸酯和2-脱氧-2-肼基己糖醇七乙酸酯在彼此存在的情况下独立鉴定。化学电离质谱/质谱法可以鉴定亚皮摩尔量的衍生物。