水溶戊聚糖分级纯化组分结构初步分析

The Structural Analysis of Purified Fraction of Water Soluble Pentosan

摘要:

采用气相色谱(GC)、高效液相色谱(HPLC)、液质联用(LC／MS)、核磁共振(NMR)等分析手段，对小麦麸皮水溶戊聚糖的分级纯化组分——P-WSPIl-S进行组成和结构初步分析．研究表明：P-WSPIl-S组分由木糖和阿拉伯糖两种糖组成，两者的摩尔比为0．98，相对分子质量为831030，其可能的结构为：D-吡喃木糖以β(1→4)连接为木聚糖主链，侧链为α-呋喃阿拉伯糖，D-吡喃木糖残基可在C-2、C-3位被阿拉伯糖单独取代或同时取代，并且该组分中还含有一定量的阿魏酸基团，其通过酯化的形式与阿拉伯木聚糖共价连接．

Abstract:

A series of modern analysis methods, such as GC, HPLC ,LC/MS and NMR were used to analyze the composition and main structural features of P-WSPI1-S ,a purified fraction of wheat bran crude WSP. The molecular weight of P-WSPI1-S was 831,030, which consist