【摘要】 研究了阳离子表面活性剂 (CSAA)溴化十六烷基三甲铵 (CTAB)、溴化十六烷基吡啶 (CPB)在水溶液中与溴酚红 (BPR)的显色反应。发现在pH 5 0～ 6 0范围内 ,CSAA单体与BPR形成离子缔合物(缔合比为 3∶2 ) ,可用于微量CSAA及CSAA的临界胶束浓度 (CMC)的测定。本文还研究了显色反应的适宜条件、分析特征 ,并讨论了反应机理更多还原

【Abstract】 The suitable conditions,mechanism,characteristics and analytical applications of bromphenol red (BPR) reacting on cationic surfactants (CSAA) such as cetylpyridinium bromide (CPB) or cetyltrimetryl ammonium bromide (CTAB) were investigated.The results show that the single molecular CSAA reacts on BPR to form an ion associate complex at pH 5 0～6 0,and its molar ratio (CSAA∶BPR) is 3∶2.Based on this color reaction,the critical micelle concentration (CMC) of CTAB and CPB was determined,and the possibility for the determination of trace CTAB and CPB were proposed.更多还原