分析测试学报2012，Vol.31Issue(4)：459-463,5.DOI:10.3969/j.issn.1004-4957.2012.04.016
金-钯双金属纳米颗粒修饰玻碳电极阳极溶出伏安法测定三价砷的方法研究
Determination of Arsenite in Water by Anodic Stripping Voltammetry Using Au- Pd Bimetallic Nanoparticles Modified Glassy Carbon Electrode
摘要
Abstract
An anodic stripping voltammetric method for the determination of arsenite using Au - Pd bimetallic nanoparticles( Au-Pd NPs) modified glassy carbon electrode (Au -Pd/GCE) was developed. The structural information and electrochemical activities of the synthesized Au - Pd nanoparti-cles were investigated with UV - Vis spectroscopy, high resolution transmission electron microscopy ( HRTEM) and cyclic voltammetric ( CV) method. The determination of arsenic was conducted by square wave voltammetric(SWV) method. Effects of deposition potential and SWV parameters (such as frequency, increment and amplitude) on the current intensity of arsenite were investigated. The results showed that Au - Pd bimetallic nanoparticles presented a core - shell structure in shape and the modified electrode exhibited the characteristic peaks of both Au and Pd. A sensitive anodic stripping peak of arsenite appeared at about 0. 30 V, and the peak current was linear with concentration of arsenite in the range of 0. 5-20 μg/L with a limit of detection ( LOD) of 0. 15 μg/L, which is far below the maximum guideline value(10μ/L) set by World Health Organization(WHO). The modified electrode exhibited a good repeatability toward the consecutive determination of arsenite. The interference experiments also showed that except for Cu( II ), the existance of Pb( II ) , Cd( H ) and Zn( II) would not affect the detection of As( 1).关键词
金-钯双金属纳米颗粒/玻碳电极/溶出伏安法/砷Key words
Au - Pd bimetallic nanoparticles/ glassy carbon electrode/ stripping voltammetry/ arsenite分类
化学化工引用本文复制引用
蓝月存,罗汉金,王灿..金-钯双金属纳米颗粒修饰玻碳电极阳极溶出伏安法测定三价砷的方法研究[J].分析测试学报,2012,31(4):459-463,5.基金项目
国家自然科学基金资助项目(40973074) （40973074）
国家重大科技专项水污染控制与治理技术评估体系研究项目(2009ZX07529-002) （2009ZX07529-002）
