复合铋膜电极阳极溶出法测定水样中的痕量铟  

Determination of trace indium in water samples by anodic stripping voltammetry on a composite bismuth film electrode

作　　者：杨海青[1] 彭波[1] 王伟峰[1] 杨梅霞[1] 潘玉莹[1] 马永钧[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃省高分子材料重点实验室,兰州730070

出　　处：《分析试验室》2010年第1期47-50,共4页Chinese Journal of Analysis Laboratory

基　　金：甘肃省自然科学基金(2007GS03562)项目资助

摘　　要：在玻碳电极上采用电化学沉积法制备了新型铕离子掺杂普鲁士蓝复合铋膜电极,建立了用示差脉冲阳极溶出法测定环境水样中痕量铟的分析方法。讨论了铟在常规铋膜电极和复合铋膜电极上的溶出性能,对铋膜的厚度、支持电解质、测定底液的pH、富集时间和富集电位等参数进行了优化。在最佳实验条件下,铟的阳极溶出峰电流与其浓度在2～20μg/L和20～100μg/L范围内分别呈良好的线性关系,检测下限为0.15μg/L（S/N=3）,相对标准偏差RSD〈2.0%。该法用于实际水样中痕量铟的测定,样品回收率为97.5%～103%。A novel composite bismuth film electrode（GC/Eu-PB/BFE） was prepared by electrodepositing bismuth film on the glassy carbon matrix which was modified with europium-doped Prussian blue analogue（Eu-PB）.In addition,trace levels of indium was determined by anodic stripping voltammetry using the GC/Eu-PB/BFE as a working electrode.The comparison of stripping properties of In3＋ between the common bismuth and the composite bismuth had been studied.Some of effect factors such as the thickness of bismuth film,supporting , electrolyte, pH of determining solution, deposition time and deposition potential were optimized. Under the optimum conditions, good linearity was ob- tained in the concentration range of 2 - 20 gg/L and 20 - 100μg/L, respectively. The limit of detection was 0.15 μg/L and relative standard deviation was under 2.0%. The method had been applied to the determination of indium ion in environmental water samples with the recoveries of 97.5% - 103%.

关 键 词：复合铋膜电极 阳极溶出伏安法 铟的测定 类普鲁士蓝 

分 类 号：O657.1[理学—分析化学]