新显色剂4-溴-2-磺酸基苯基重氮氨基偶氮苯的合成及其与镉(Ⅱ)的显色反应  

Synthesis of a chromogenic reagent 4-bromo-2-sulfo-benzenediazoaminoazobenzene(BSDAA) and its application to spectrophotometric determination of microamounts of cadmium(Ⅱ)

作　　者：孟双明[1] 许琳[1] 方国臻[1] 马海兵[1] 郭永[1] 

机构地区：[1]山西雁北师范学院化学系,大同037000

出　　处：《分析试验室》2002年第1期30-32,共3页Chinese Journal of Analysis Laboratory

摘　　要：报道了一种新型的三氮烯类偶氮染料的合成方法及其与Cd(Ⅱ )的显色反应。实验表明 ,在TritonX 1 0 0存在下的弱碱性介质中 ,试剂与镉 (Ⅱ )形成 2∶1的红色络合物 ,摩尔吸收系数为 2 .1× 1 0 5L·mol- 1 ·cm- 1 ;镉含量在 0 μg/2 5mL～ 2 5 μg/2 5mL范围内遵守比耳定律。The synthesis of a chromogenic reagent 4 bromo 2 sulfobenzene diazoaminoazobenzene(BSDAA) was described. In the pH 10.0～11 0 ammonia ammonium chloride buffer solution a 1∶2 red complex of Cd(Ⅱ) and BSDAA is formed in the presence of TritionX 100, which gave a maximum absorption at 526 nm with an apparent molar absorptivity of 2.1×10 5 L· mol -1 ·cm -1 . The method was used to spectrophotometric determination of cadmium(Ⅱ) in waste water with satisfactory results.

关 键 词：合成 4-溴-2-磺酸基苯基重氮氨基偶氮苯 分光光度法 镉 测定 废水 微量分析 

分 类 号：X703[环境科学与工程—环境工程] X132