新试剂1-(2-羟基-3,5-二硝基苯基)-3-[4-(苯基偶氮)苯基]-三氮烯的合成及与季铵盐型阳离子表面活性剂的显色反应  

Synthesis of Reagent 1-(2-Hydroxy-3,5-dinitrophenyl-3- (4-phenylazophenyl)triazene and Its Color Reaction with Quaternary Ammonium Cationic Surfactant

作　　者：冯泳兰[1] 邝代治[1] 

机构地区：[1]衡阳师范学院化学系,衡阳421008

出　　处：《分析化学》1999年第7期836-840,共5页Chinese Journal of Analytical Chemistry

基　　金：湖南省教育委员会资助项目

摘　　要：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 synthesis of a new reagent 1-(2-hydroxy-3, 5-dinitiophenyl)-3-(4-phenylazophenyl)- triazene (HDNPAP) and the condition of its color reaction with cethyltrimethylammonium bromide (CTMAB), cetylpyridinium bromide (CPB) and dodecyldimethylbenzylammonium bromide (DDMBAB) have been stuided. In NaOH medium, HDNPAPT reacts with quatermary ammonium cationic surfactant (CTMAB, CPB, DDMBAB) to form a purple-red ion pair complex with the molar ratio of 1:3. The maximum absorption wavelengths of the complexes are at 560 nm for CTMAB and CPB, at 620 nm forDDMBAB. The apparent molar absorptivities of CTMAB, CPB and DDMBAB are 2.43×104, 1.65×104 and 2.82×103 L·mol-1·cm-1 respectively. Beer's law is obeyed in the range of 0-14.58 mg/L forCTMAB, 0-30.76 mg/L for CPB and 0-23.07 mg/L for DDMBAB. The method has been applied tothe direct determination of cationic surfactant in electrodeposit waste liquid with satisfactory results.

关 键 词：阳离子 表面活性剂 DDMBAB CMTAB CPB HDNPAPT 

分 类 号：O647.2[理学—物理化学] TQ421.383[理学—化学]