同步镀铋膜差分脉冲伏安法测试土壤中铬  

Determination of Chromium in the Soil with Differential Pulse Voltammetry and Synchronous Plating Bismuth Electrode

作　　者：刘成伦[1,2] 陈林[2] 杨玉娥[2] 刘正实[2] 杨琦[2] 

机构地区：[1]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室 [2]重庆大学化学化工学院

出　　处：《光谱实验室》2010年第2期517-519,共3页Chinese Journal of Spectroscopy Laboratory

基　　金：重庆市科委自然科学基金资助项目(编号:CSTC;2007BB0200);重庆大学"211工程"三期创新人才培养计划项目(编号:S-09103)

摘　　要：采用同步镀铋膜法修饰玻碳电极及差分脉冲溶出伏安法测试土壤中Cr。在优化的实验条件下,以KNO3为支持电解质,NaAc-HAc(pH=5.5)为缓冲溶液的铋膜上得到Cr溶出特征峰电位为-1.14V,线性方程为:I=0.0747C+0.31054,相关系数为0.9981,检出限为0.001μg/L,线性范围为0.01—60μg/L,RSD=2.47%,该方法简单快速,准确度和精密度均符合要求,回收率为96.7%—104.5%。Bismuth film modified glassy carbon electrode was prepared for the determination and chemical speciation analysis of a trace level of Cr in soil by differential pulse stripping voltammetry （DPSV）. The sensitive stripping peaks of the ions were obtained and compared with that obtained using bismuth film electrodes in KNO3 supporting electrolyte and NaAc-HAc （pH = 5. 5） buffer solutions. Thc adsorptive stripping peaks potential of Cr is characteristic at -1.14V under the best condition. The linear equation is the following： I = 0. 0747C±0. 31054, r =0. 9981, the linear concentration is in the range of 0. 01--60ug/L,the relative standard deviation （RSD）is 2.47 %,and the recovery is about 96.7%--104.5%.

关 键 词：同步镀铋膜电极 铬 差分脉冲溶出伏安法 土壤 

分 类 号：O657.14[理学—分析化学]