GB/T 5173-1995 in English

《GB/T 5173-1995表面活性剂和洗涤剂 阴离子活性物的测定 直接两相滴定法》由TC272（全国表面活性剂和洗涤用品标准化技术委员会）归口，主管部门为中国轻工业联合会。
本标准规定了测定阴离子表面活性剂和洗涤剂中阴离子活性物的两相滴定法。本标准适用于分析烷基苯磺酸盐、烷基磺酸盐、烷基硫酸盐、烷基羟基硫酸盐、烷基酚硫酸盐、脂肪醇甲氧基及乙氧基硫酸盐和二烷基琥珀酸酯磺酸盐，以及每个分子含一个亲水基的其他阴离子活性物的固体或液体产品。本标准不适用于有阳离子表面活性剂存在的产品。若以质量百分含量表示分析结果时，阴离子活性物的相对分子量必须已知或预先测定。

Scope

This standard specifies the two-phase titration method for the determination of anionic surfactants and anionic active substances in detergents. This standard is applicable to the analysis of alkylbenzene sulfonate, alkyl sulfonate, alkyl sulfate, alkyl hydroxy sulfate, alkylphenol sulfate, fatty alcohol methoxy and ethoxy sulfate and dialkyl Solid or liquid products of succinate sulfonates and other anionic actives containing one hydrophilic group per molecule. This standard does not apply to products containing cationic surfactants. If the analysis result is expressed in mass percent, the relative molecular weight of the anionic active substance must be known or determined in advance. Note: ① When the content of low relative molecular weight sulfonate (toluene and xylene sulfonate) as water co-solvent in the detergent is less than 15% of the anionic active substance, it will not interfere with the analysis results, but when it is higher than 15% , and its impact should be estimated. ② Soap, urea, edetate and sodium carboxymethylcellulose do not interfere. ③When there are non-ionic surfactants, the impact should be estimated according to each special situation. ④ Typical inorganic components in detergent formulations, such as sodium chloride, sodium sulfate, sodium borate, tripolyphosphate, sodium perborate, sodium silicate, etc. do not interfere, but bleaching agents other than sodium perborate should be to be destroyed, and the sample should be completely soluble in water.