摘要
针对目前测定季铵盐型阳离子表面活性剂常用方法存在的问题和不足 ,提出了一种新的测定方法——百里酚蓝 -亚甲蓝混合指示剂法 .该法采用了百里酚蓝和亚甲蓝两种常见的指示剂进行测定 ,与国际标准 ISO- 2 781法及传统亚甲蓝法进行比较 ,结果表明 ,采用本方法比国际标准方法药品易得 ,测定成本低 ,毒性小 ,操作方便 ,测定误差 <0 .3% (与国际标准方法等效 )比亚甲蓝法的测定结果 (误差 <1 % )准确度高 ,且终点变化明显 ,容易观察到 .
The shortcomings in determining the content of cationic surfactantof quaternary ammo- nium salt with commonly used method is aimed.A new determined method—thymol blue- methylene blue mixed indicator method be put forward.Using two commonly used indicatorsto determine them can find that with the new method the agent is easier to get,cheaper,less poissonous,taking shorter time than the international standard method ISO- 2 781 .The de- termined error of the new method is less than0 .3% .It has a clearer endpoint and more accu- rate result than the methylene blue method determined error is more than1 % .
出处
《郑州轻工业学院学报》
1998年第4期10-14,共5页
Journal of Zhengzhou Institute of Light Industry（Natural Science）
关键词
阳离子
表面活性剂
百里酚蓝
亚甲蓝
季胺盐
quaternary ammonium
cationic surfactants
determination
thymol blue- methylene blue
