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合成了新试剂1-(2-羟基-3,5-二硝基苯基)-3-[4(苯基偶氮)苯基]-三氮烯(HDNPAPT),研究了该试剂在NaOH介质中与阳离子表面活性剂漠化十六烷基三甲铵(CTMAB)、溴化十六烷基吡啶(CPB)、溴化十二烷基二苄铰(DDMBAB)形成1:3的紫红色离子缔合物显色体系.测定了显色体系表面活性剂的临界胶束浓度、表观摩尔吸光系数ε_(max)、符合比尔定律的范围.探讨了微量阳离子表面活性剂CMTAB、CPB和DDMBAB的测定方法,结果满意.
The new reagent 1- (2-hydroxy-3,5-dinitrophenyl) -3- [4 (phenylazo) phenyl] -triazene (HDNPAPT) Cationic surfactants with cetyltrimethylammonium bromide (CTMAB), cetylpyridinium bromide (CPB) and dodecyldibenzylammonium bromide (DDMBAB) form a 1: 3 magenta ionophore The colorimetric system was used to determine the critical micelle concentration and the apparent molar absorptivity ε max of the color system surfactant in the range of Beer’s Law.Methods The determination of trace cationic surfactants CMTAB, CPB and DDMBAB Method, the result is satisfactory.