复合汞膜修饰电极测定水样中超微量Cd^(2＋)  

Determination of cadmium ion using complex mercury film modified glassy carbon electrode

作　　者：李莉 鲁峰 杨武[2] 

机构地区：[1]甘肃有色冶金职业技术学院,金昌737100 [2]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,兰州730070

出　　处：《化工新型材料》2017年第1期179-181,共3页New Chemical Materials

基　　金：国家自然科学基金(20873101);甘肃省教育厅自筹经费科研项目(2014B-153)

摘　　要：研究了用复合汞膜修饰电极定量测定超微量镉的方法。以0.001mol/L NH4Cl为支持电解质,利用阴极扫描伏安法和阳极溶出伏安法分别进行测定,镉的出峰电位分别为-0.708和-0.788V,线性范围均为(1.0×10^(-8)~1.0×10^(-4)mol/L。尤其用溶出法所测的峰形好且干扰少,此法可用于环境水样中镉的检测。Determination of trace levels of Cd^2＋,using complex mercury film modified glassy carbon electrode was investigated.Cathodic scanning voltammetry and anodic stripping voltammetry were used to detect Cd^2＋ in NH_4Cl supporting electrolyte,the peak potentials were -0.708V and -0.788 Vrespectively.The linear relationship between peak currents and concentrations of Cd^2＋ was found in the range of（1.0×10^-8~1.0×10^-4）mol/L.Especially better peak shapes and weaker interference could be got using anodic stripping voltammetry.This method can be used in determination of content of Cd^2＋ in environmental water samples and tap water.

关 键 词：复合汞膜 修饰电极 镉离子 

分 类 号：X832[环境科学与工程—环境工程] O657.1[理学—分析化学]