催化动力学分光光度法测定痕量铬(Ⅵ)  

CATALYTIC KINETICS SPECTROPHOTOMETRIC DETERMINATION OF TRACE CHROMIUM(Ⅵ)

作　　者：黄湘源[1] 陈虹[1] 李志梅[1] 

机构地区：[1]南昌大学化学系,江西南昌330047

出　　处：《南昌大学学报（理科版）》2003年第2期138-140,共3页Journal of Nanchang University(Natural Science)

基　　金：江西省自然科学基金资助项目(Z-1249)

摘　　要：在pH为1-2的强酸性介质中,利用痕量铬(Ⅵ)催化溴酸钾氧化H酸-钠盐显色的指示反应,研究了显色反应的最佳反应条件,建立了催化动力学光度法测定痕量铬(Ⅵ)的新方法。本方法线性范围为:0.16μg/mL-0/04μg/mL,检测限为1.04×10-5g/L,相对标准偏差为1.43%,回收率为99-103%,将其直接用于废水中铬(Ⅵ)的测定,结果满意。A new catalytic kinetics spectrophotometic method for the determination of trace chromium(Ⅵ) has been developed.The method is based on the catalytic action of chromium(Ⅵ) on the oxidation of 1-Amino-8-naphthol-3,6-disulfonic acid with potassium bromate.The optimum conditions of the reaction were established.The linear range of this method was 0.16-0.40 mg/L and the relative standard deviation was found to be 1.43% for Cr(Ⅵ) (10replicates).The detection limit for Cr(Ⅵ) is 1.04×10-5 g/L.The method was used to determine Cr(Ⅵ) in waste water successfully.

关 键 词：铬 含量测定 催化动力学分光光度法 溴酸钾 显色反应 废水监测 反应条件 

分 类 号：X832[环境科学与工程—环境工程]