GB/T 5174-2004 in English

《GB/T 5174-2004表面活性剂 洗涤剂 阳离子活性物含量的测定》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。
本标准规定了表面活性剂、洗涤剂中阳离子活性物的测定方法本标准适用于测定阳离子活性物如：a)单、双、三脂肪烷基叔胺季铵盐，硫酸甲酯季铵盐；b)长链酰胺乙基及烷基的咪唑啉盐或3-甲基咪唑啉盐；c)氧化胺及烷基吡啶嗡盐。本标准适用于固体活性物或活性物水溶液。若其含量以质量分数表示，则阳离子活性物的平均相对分子质量必须已知，或预先测定。本标准不适用于有阴离子或两性表面活性剂存在时的测定。

1 Scope

This standard specifies the determination method of cationic-active matter in surface active agents and detergents.

This standard is applicable to determine the cationic-active matter, e.g.:

a) Single-, dual- and tri-alkyl tertiary amine quaternary ammonium salt, and sulfuric acid methyl ester quaternary ammonium salt;

b) Long-chain amide ethyl and alkyl imidazolinium or 3-methyl imidazolinium;

c) Amine oxide and alkyl pyridinium.

This standard is applicable to solid active matter or active matter water solution. If its content is expressed in mass fraction, %, the mean relative molecular mass of cationic-active matter must be known or determined in advance.

This standard is not applicable to the determination when anionic or amphoteric surface active agent exists.

Note: for tosylate and xylenesulfonate with relatively low molecular mass adopted as the cosolvent, when their concentration (mass fraction) relative to active matter is less than or equal to 15%, there is no interference. If the concentration is greater, its influence shall be considered.

Non-ionic surface active agent, soap, urea and edetate will not generate interference. Typical inorganic constituents of detergent formula, such as sodium chloride, sodium sulfate, sodium tripolyphosphate, sodium borate, peroxydol and sodium silicate, will not generate interference. However, other bleaching agents other than perborate shall be damaged before analysis.

2 Normative References

Foreword II
1 Scope
2 Normative References
3 Theory
4 Reagents
5 Instruments
6 Sample Preparation
7 Analytical Procedures
8 Expression of Results
9 Precision
10 Test Report