四苯硼钠反滴法测季铵内盐的含量

Reverse titration for the determination of amphoteric inner quatemary ammonium with four benzene boron sodium

十三烷基二甲基(2-亚硫酸)乙基铵为长链两性季铵内盐型化合物,具有优良的杀菌和缓蚀性能及清洗剥离效果、良好的水溶性,并且毒性低,可与常用的水质处理剂进行复配.为了能简单方便地测出季铵内盐的质量分数,建立了四苯硼钠反滴的方法,由此可测出十三烷基二甲基(2-亚硫酸)乙基铵的含量,标准偏差小,具有足够的精确度和可靠性.

Tridecyl-dimethyl-（2-sulfurous acid）-ethyl ammonium, an amphoteric inner quaternary ammonium compound of long chain, has good sterilization loses, gentle performance of washing strip, good water solubility, and low toxicity. It can be mixed with commonly used water treatment agents. In order to test the mass composition of the amphoteric inner quaternary ammonium conveniently, four benzene boron sodiums were used in reverse titration to measure the content of tridecyl-dimethyl-（2-sulfurous acid ） -ethyl ammonium. Smaller standard deviation and good accuracy and dependability can be obtained by the method.