催化动力学光度法测定痕量对苯二胺  

Catalytic kinetic spectrophotometric determination of trace p-phenylene diamine

作　　者：赖仁玲[1] 王园朝[1] 欧明慧[1] 

机构地区：[1]杭州师范大学材料与化学化工学院,浙江杭州310036

出　　处：《化学研究与应用》2010年第11期1392-1395,共4页Chemical Research and Application

基　　金：浙江省大学生创新基金项目

摘　　要：对苯二胺是一种重要的化工原料,常用作偶氮染料和硫化染料的中间体,也是合成染发剂中的主要成份,因其对人体有强烈的致敏作用,染发剂中最高允许含量为6%。同时对苯二胺也是国际公认的一种致癌物,随着化工工业的迅速发展,对苯二胺的废水排放量日益增加,严重污染了环境,也危害着人体健康。In the sulfuric acid and 25 ℃ water bath,discoloration reaction during potassium iodate oxidizing 2-（3,5-diBr-2pyridylazo）-5-diethylaminophenol can be catalyzed by p-phenylene diamine.According to this phenomenon,a new method of trace p-phenylene diamine determination by catalytic kinetic spectrophotometry was established.The optimal experimental conditions were discussed.A good linear relationship is obtained in the concentration range of 1.5 ～ 15 mg·L-1 for p-phenylene diamine and the detection limits was 0.018 mg·L-1.The kinetic parameter of this reaction was also determination and the result showed that the reaction was first-order reaction.The apparent ratio constant was 8.84 × 10-3s-1 and apparent active energy of the reaction was 7.17 kJ·mol-1.The method proposed was applied to the determination of p-phenylene diamine in hair dye and environmental waste water,relative standard deviation of results for five consecutive were 3.7% and 2.3%,and the average recovery ratio were between 98.7% ～ 102.9%.

关 键 词：对苯二胺 2-(3 5-二溴-2-吡啶偶氮)-5-二乙氨基酚 碘酸钾 催化动力学光度法 染发剂 

分 类 号：O657.32[理学—分析化学]