新三氮烯显色剂合成及对镉的显色性能研究  

Study on the Synthesis of New Chromogenic Color Reagent and on Its Color Reaction with Cadmium

作　　者：凌玮 刘俊康 胡红旗 胡小艳 李在均 

机构地区：[1]江南大学化学与材料工程学院

出　　处：《光谱实验室》2008年第5期878-882,共5页Chinese Journal of Spectroscopy Laboratory

基　　金：国家自然科学基金20676052

摘　　要：报道了一种新的显色剂(4-氟-4′-偶氮苯基重氮氨基偶氮苯,简称:FADAB)的合成、性质及其与Cd()的显色反应。在弱碱介质中,Triton X-100存在下该试剂与Cd()形成络合比为4∶1的红色络合物。络合物在最大吸收波长524nm处,线性范围为0—10μg/25mL,最大摩尔吸光系数达到1.79×105L·mol-1·cm-1。有较好的选择性,用于测定环境土壤样中镉含量,结果令人满意。New chromogenic reagents, 4-fluoro-4′-azobenzene-diazoaminobenzen, and its color reaction with cadmium was studied. In a pH 9. 5 borate buffer medium and in the presence of Triton X-100,the reagent reacts with Cd（ Ⅱ ） to form a 1 ： 4 red complex. The absorption maxima of Cd- FADAB is at 524nm,with molar absorptivity of 1.79×10^5L·mo1^-1· cm^-1. Beer＇s law is obeyed in the range of 0-10μg/25mL. The method was applied to the determination of cadmium in soil sample of environment.

关 键 词：显色剂 4-氟-4′-偶氮苯基重氮氨基偶氮苯 镉 

分 类 号：O657.32[理学—分析化学]