镉试剂分光光度法测定季铵盐型阳离子表面活性剂  

Spectrophotometric determination of quaternary ammonium salt type cationic surfactants with cadion NPPAPT

作　　者：李美蓉 孙方龙[2] 郭长会[3] 刘慧英[3] 黄银 刘晓青 

机构地区：[1]中国石油大学(华东)理学院,山东青岛266580 [2]中国石油化工集团公司华北石油局西部工程公司,新疆轮台841600 [3]胜利油田胜利勘察设计研究院有限公司,山东东营257026

出　　处：《日用化学工业》2012年第5期383-385,共3页China Surfactant Detergent & Cosmetics

摘　　要：基于季铵盐型阳离子表面活性剂与1-(4-硝基苯基)-3-[4-(苯基偶氮)苯基]三氮烯(镉试剂,NPPAPT)发生显色反应,建立了一种镉试剂分光光度法测定聚环氧丙烷季铵盐型表面活性剂(CP-60)的方法。测试结果表明,测定的最大吸收波长为382 nm,CP-60的质量浓度在0～0.13 mg.L-1内,符合比尔定律;将该方法直接应用于相对分子质量较小的十二烷基二甲基苄基氯化铵(1227)和十六烷基溴化吡啶(CPB)的测定,同样获得了满意的结果。Based on chromogenic reaction of quaternary ammonium salt type cationic surfactants with 1 - （4 - nitrophenyl） -3 - （4 -phenylazophenyl）triazene （cadion NPPAFF）, a new method for spectrophotometric determination of polypropylene oxide quaternary ammonium salt type cationic surfactant （CP- 60 ） was established. Test results showed that the maximum wavelength is 382 nm. Within range of mass concentration of surfactant solution 0 - 0. 13 mg · L^-1, the relationship between the absorption and the concentration follows Beer＇ s law. This method was directly applied to quaternary ammonium salt type cationic surfactants of the smaller relative molecular weight such as dodecyldimethylbenzylammonium chloride （1227） and eetylpyridinium bromide （CPB） , and satisfactory results were also obtained.

关 键 词：季铵盐型表面活性剂 分光光度法 镉试剂 显色反应 

分 类 号：O657.3[理学—分析化学] X832[理学—化学]