新试剂4,4′-二(4-苯偶氮苯氨基重氮基)二苯醚与镉(Ⅱ)的显色反应  

Color Reaction of a New Triazene Reagent 4,4′-Di-(4-Phenylazophenylaminodizo) Diphenylether with Cadmium(Ⅱ)

作　　者：马鹏飞[1] 刘慧君[1] 雷海瑞[1] 郭永[1] 孟双明[1] 

机构地区：[1]山西大同大学化学与化工学院,山西省大同市御河桥东兴云街037009

出　　处：《光谱实验室》2011年第5期2620-2622,共3页Chinese Journal of Spectroscopy Laboratory

基　　金：山西省普通高校大学生创新性实验项目;山西省自然科学基金项目(2010011018)

摘　　要：研究了新显色剂4,4′-二(4-苯偶氮苯氨基重氮基)二苯醚(PPDPE)与镉()的显色反应。在Triton X-100存在下,于pH10.22的硼砂-氢氧化钠缓冲溶液中,镉()与4,4′-二(4-苯偶氮苯氨基重氮基)二苯醚形成摩尔比1∶2的红色络合物,试剂及络合物的最大吸收波长分别为400nm和530nm,表观摩尔吸光系数为2.05×105L.mol-1.cm-1,镉()含量在0—10.0μg/25mL范围内符合比耳定律。方法用于废水中镉的测定,结果满意。The color reaction of a new triazene reagent 4,4′-di-（4-phenylazophenylaminodizo） diphenylether（PPDPE） with cadmium（Ⅱ） was investigated.The stable red complex was formed between cadmium（Ⅱ） and PPDPE with ratio mole of 1∶2 in Na2B4O7-NaOH buffer solution at pH 10.22 in the presence of TritonX-100.The maximum absorptions of the reagent and the complex were at 400nm and 530nm,respectively.The molar absorptivity constant was 2.05×105L·mol-1·cm-1 for the complex.Beer＇s law was obeyed in the range of 0—10.0μg/25mL for cadmium（Ⅱ）.The proposed method was used for the determination of cadmium（Ⅱ） in waste water with satisfactory results.

关 键 词：4 4′-二(4-苯偶氮苯氨基重氮基)二苯醚 镉(Ⅱ) 分光光度法 显色反应 

分 类 号：O657.32[理学—分析化学]