羧甲基纤维素钠取代度测定的新方法  

Novel method on the determination of DS of CMC

作　　者：曾晖扬[1] 李卓美[1] 

机构地区：[1]中山大学高分子研究所,广州510275

出　　处：《纤维素科学与技术》1996年第4期38-43,共6页Journal of Cellulose Science and Technology

基　　金：中国科学院广州化学研究所纤维素开放实验室资助

摘　　要：对测定羧甲基纤维素（CMC）的取代度（DS）方法进行了探讨，发现虽然电导滴定法可较快地和较准确地测定DS，但是易受反应副产物的影响。采用红外光谱法可达到快速测定DS，并且可直观地大致判断出样品的纯度，以决定是否需要对样品进行提纯精制。Degree of substitution of carboxpoethyl groups (DS) in carboxymethyl cellulose (CMC) had been discussed. It was found that the conductometric titration method was affected markedly by the by-products,although this method was a convenient one.The DS could be determined by using infrared spetrum more easily and rapidly, and at the same time the purity of CMC sample might be estimated, too.

关 键 词：羧甲基纤维素 取代度 电导滴定 红外光谱 纤维素 

分 类 号：TQ352.7[化学工程]