新显色剂2,6-二羟基苯基重氮氨基偶氮苯与镉的显色反应的研究和应用  

STUDY ON THE COLOR REACTION OF Cd(Ⅱ) WITH THE NEW REAGENT 2,6- DIHYDROXYPHENYLDIAZOAMINOAZOBENZENE AND ITS APPLICATION

作　　者：刘永文[1] 孟双明[1] 方国臻[1] 郭永[1] 潘教麦[2] 

机构地区：[1]山西省雁北师范学院化学系,大同037000 [2]华东师范大学化学系

出　　处：《理化检验（化学分册）》2002年第2期61-62,65,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：合成了新试剂 2 ,6 二羟基苯基重氮氨基偶氮苯 ,并研究了在TritonX 10 0存在下其与镉的显色反应。在 1mol·L-1氨水中Cd(Ⅱ )与显色剂生成 1∶3的稳定红色配合物 ,最大吸收波长为5 2 0nm ,表观摩尔吸光系数为 1.97× 10 5L·mol-1·cm-1,Cd(Ⅱ )在 0～ 18μg 2 5ml范围内符合比耳定律 ,方法有较高的选择性。用于废水中微量镉的直接测定 。The synthesis of a new reagent DHDAA and its chromogenic reaction with cadmium(Ⅱ) in the presence of Triton X 100 was studied. In a 1.0mol·L -1 ammonia solution, Cd(Ⅱ) reacts with DHDAA to form a stable red complex with molar ratio of 1∶3. The apparent molar absorptivity is 1.97×10 5L·mol -1 ·cm -1 at the maximum absorption of 520nm. Beer′s law is obeyed over the range of 0～18μg Cd(Ⅱ) in 25ml solution. The method shows higher selectivity and has been applied to determine cadmium derectly in waste water with satisfaction.

关 键 词：吸光光度法 2 6-二羟基苯基重氮氨基偶氮苯 镉 废水 测定 微量分析 

分 类 号：X132[环境科学与工程—环境科学] X832.02