催化动力学光度法同时测定痕量铅和镉  

Simultaneous determination of trace lead and cadmium by catalytic kinetic-spectrophotometry

作　　者：黄湘源[1] 陈永晖[1] 陈虹[1] 

机构地区：[1]南昌大学化学与材料科学学院,南昌330047

出　　处：《分析试验室》2002年第6期67-70,共4页Chinese Journal of Analysis Laboratory

基　　金：江西省自然科学基金项目

摘　　要：在十六烷基三甲基溴化铵 (CTAB)存在下 ,痕量的Pb(Ⅱ )和Cd(Ⅱ )在硼酸 氯化钾 氢氧化钠缓冲体系中 ,能同时催化过硫酸铵氧化焦锫酚红 (PR)而发生褪色指示反应 ,通过研究该反应的最佳反应条件以及将多元线性回归 (MLR)用于数据处理 ,建立了同时测定铅和镉的新方法 。Trace lead(Ⅱ) and cadmium could catalyze the discoloration reaction of pyrogallol red oxidized by (NH 4) 2S 2O 8 in H 3BO 3 KCl NaOH buffer solution with the existence of CTMAB. The optimal kinetic conditions were investigated in detail and multivariate linear regression was used in the data processing. A method for the simultaneous determination of trace lead and cadmium was then proposed. It was applied to the determination of trace lead and cadmium in waste water and copper mine offscum with satisfactorily results.

关 键 词：同时测定 铅 镉 催化动力学光度法 多元线性回归 痕量分析 

分 类 号：O614.242[理学—无机化学] O61[理学—化学]