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一、引言众所周知,测定离子性表面活性剂平均分子量(MMM)的准确数据,对两相滴定中计算真实结果非常重要。早已充分注意到表面活性剂MMM的测定,但到目前还没有通用的方法。在C.I.D.国际分析委员会中,由实验室分析检验了一种联合方法;用H_3PO_4使ABS脱磺,萃取分离游离的AB,并用非极性固定相的毛细管GC分离AB,ABMMM的重复性是4个,而再现性是4.8个MMM单位。ABS MMM的结果分别
I. INTRODUCTION It is well known that accurate data for the determination of the average molecular weight (MMM) of an ionic surfactant is very important for calculating the true result in a two-phase titration. Already fully aware of the determination of surfactant MMM, but so far there is no common method. At the CID International Analytical Committee, a combined approach was examined by laboratory analysis; the ABS was desalted with H_3PO_4, the free AB extracted by extraction and the AB separated by a capillary GC with non-polar stationary phase. The repeatability of the ABMMM was 4 , While reproducibility is 4.8 MMM units. ABS MMM results respectively