摘要
目的：建立了分光光度法测定氯化十四烷基二甲基苄铵的新方法。方法：在pH11．5—12．5碱性介质中，利用4，4′-二（2-氯-4-硝基重氮氨基）联苯（CNDADP）与氯化十四烷基二甲基苄铵（Zeph）的显色反应，在最大吸收波长580nm处，用光度法测定水样中微量的Zeph。结果：Zeph的浓度在0～3．0×10%^-5mol／L范围内符合比耳定律。表观摩尔吸光系数为2．39×10^4/mol·cm。结论：方法简单，灵敏度高，选择性较好，可用于水中微量氯化十四烷基二甲基苄铵的测定。
Objective： To establish a new speetrophotometric method for the determination of mieroamounts of tetradeyltrimeth- ylbenzylammonium chloride （Zeph）. Methods：In the medium of pH 11.5 - 12. 5, Zeph was determined by spectrophotometrie method which was based on the colour reaction of Zeph with 4,4′ - Di （ 2 - cholro - 4 - nitropheryl diazoamino） diphenyl （CNDADP）. The absorbanee of the ion pair complex was measured at 580 nm. Results： Beer＇s law was obeyed for Zeph in the concentration range 0 - 3.0 × 10^-5 mol/L, the molar absorptivity was 2. 39 × 10^4 L/mol · cm. Conclusion： The method is simple and of high sensitivity and good selectivity.
出处
《中国卫生检验杂志》
CAS
2008年第11期2260-2261,共2页
Chinese Journal of Health Laboratory Technology
