邻羧基苯基重氮氨基偶氮苯光度法测定废水中的镉  

Determination of Cd(Ⅱ) in Waste Water by the Photometry of O-carboxybenzenediazoaminobenzene-p-azobenzene

作　　者：李冠峰[1] 刘晶[1] 吉苏宁[1] 陈萍[1] 

机构地区：[1]洛阳师范学院化学化工学院,河南洛阳471022

出　　处：《洛阳师范学院学报》2009年第2期78-79,共2页Journal of Luoyang Normal University

摘　　要：碱性条件下,在OP乳化剂存在下,邻羧基苯基重氮氨基偶氮苯试剂能与镉形成摩尔比为3∶1的红色配合物,配合物最大吸收波长位于520nm,表观摩尔吸光系数为1.88×105L·mol-1·cm-1.在25mL溶液中,镉量在0～10μg范围内符合比尔定律.结合萃取分离,该方法可用于废水中微量镉的测定.A highly sensitive and selective method for spectrophotometric determination is developed. The result showed that one kind of 3 ： 1 red complex compound under the condition of alkalinity and OP emulgator existence by using O-Carboxybenzenediazoaminobenzene-p-azo benzene and cadmium, were obtained, having an absorption maximum at 520 nm with a molar absorptivity of 1.88 × 10^5L · mol^-1 · cm^-1 Beer＇ s law was obeyed in the concentration range of 0 -10 μg/25mL for Cd（II）. It has been applied to the determination of trace of Cd （II） in waste water by using extract separation.

关 键 词：显色反应 邻羧基苯基重氮氨基偶氮苯 镉 

分 类 号：O655.25[理学—分析化学]