铋膜电极阳极溶出伏安法检测痕量Cd金属  

Detection of Cd^(2+) by Square Wave Anodic Stripping Voltammetry Using an Activated Bismuth-film Electrodes

作　　者：要美娜 杨贤金[1] 崔振铎[1] 朱胜利[1] 李朝阳[1] 梁砚琴[1] YAO Mei-Na;YANG Xian-Jin;CUI Zhen-Duo;ZHU Sheng-Li;LI Zhao-Yang;LIANG Yan-Qin(Advanced Metallic Functional Materials Laboratory,School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学材料科学与工程学院先进金属功能材料实验室,天津300350

出　　处：《无机材料学报》2019年第1期91-95,共5页Journal of Inorganic Materials

基　　金：天津市自然科学基金(15JCQNJC03600)~~

摘　　要：镉氧化产生的溶出电流与样品中Cd^(2+)的浓度有关。本研究通过方波阳极溶出伏安法(SWASV)在活化铋膜电极(Activated BFE)上对低浓度μg/L水平的Cd(II)进行测定。通过电化学方法对电极进行初步改性,然后电沉积制备铋膜再次对电极进行改进,从而增强了对痕量目标Cd^(2+)的敏感性。对改性前后的玻碳电极(GCE)表面进行SEM、CV、EIS和SWV的表征。为了将这种伏安法传感器应用于含有低浓度Cd^(2+)的实际样品中,对检测Cd^(2+)的实验参数进行了研究。使用选定的条件,在10 min的预富集条件下Cd^(2+)的检测限为1μg/L。The stripping current arising from the oxidation of Cd was related to the concentration of Cd^2+ in the sample.This study presents the determination of Cd(Ⅱ) at low concentration μg/L levels by square wave anodic stripping voltammetry (SWASV) on an activated bismuth-film electrode (BFE).The electrode was initially modified by an electrochemical method,and then the electrodeposited bismuth-film was prepared again to improve the electrode,thereby enhancing the sensitivity to trace amounts of target Cd^2+.The surface of glassy carbon electrode (GCE) before and after modification was characterizad by SEM,CV,EIS,and SWV.The parameters for the determination of the Cd^2+ were investigated with the view of its application toward real samples containing low concentrations of Cd^2+.Using the selected conditions,the limit of detection is 1 μg/L for Cd^2+ at a preconcentration time of 10 min.

关 键 词：铋膜 阳极溶出伏安法 化学修饰电极 电化学检测 镉离子 

分 类 号：TQ174[化学工程—陶瓷工业]