The molecular weight distribution of carboxymethylcellulose or its salt is determined by gel permeation chromatography using a metal-amine complex and/or a metal-alkali complex as the mobile phase solvent. The column geometry (inside diameter/length) and flow rate for this determination are 1:40-100 and 0.2-0.5 ml/min., respectively. According to this method, the GPC determination of molecular weight distribution can be performed under the same conditions for both starting pulp and CMC.
使用
金属胺复合物和/或
金属碱复合物作为流动相溶剂,通过凝胶渗透色谱法确定
羧甲基纤维素或其盐的分子量分布。该测定的柱几何(内径/长度)和流速分别为1:40-100和0.2-0.5毫升/分钟。根据该方法,可以在相同条件下对起始纸浆和
CMC的分子量分布进行
GPC测定。