基于溶出伏安法的铋微阵列电极检测饮料中的铅和镉  

Bismuth Microelectrode Array for Adsorptive Stripping Voltammetry to Detect Lead and Cadmium in Beverage

作　　者：刘德盟[1,2] 金妍[1,2] 金庆辉[1] 赵建龙[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所传感技术联合国家重点实验室,上海200050 [2]中国科学院研究生院,北京100039

出　　处：《分析化学》2011年第11期1748-1752,共5页Chinese Journal of Analytical Chemistry

基　　金：上海科委基金(Nos.10391901600;09391911500;09JC1416500)资助项目

摘　　要：建立了基于溶出伏安法的铋微阵列电极检测饮料中重金属的方法。该传感器采用三电极体系,铋微阵列电极为工作电极,铂薄膜电极为对电极,Ag/AgCl电极为参比电极。铋是一种低毒的重金属,采用铋作为反应物质可以使检测过程更加安全。微阵列电极具有高通量测定、便于微型化、抗干扰性等优点。实验表明,该传感器可同时检测出Pb2+和Cd2+,检出限分别为0.067和0.064 mg/L,且具有很好的重复性。此传感器用于检测橙汁中的Pb2+和Cd2+,结果令人满意。A heavy metal sensor fabricated by microeleetronic mechanical system （MEMS） technology was described in this study. The sensor is three-electronic system which consisted of Bi microelectronic array working electrode, Pt counter electrode and Ag/AgC1 reference electrode. Bi is low-toxic heavy metal, so the using of Bi as reaction substances can make detection process more safely. Microarray electrode takes many advantages, such as high-throughput, miniaturization and anti-inter ference. The experiment result shows that the sensor has a good performance in simultaneously detecting Pb^2＋ , Cd^2＋. The detection limits of these two metals are 0. 067 mg/L. （Pb） and 0. 064mg/L （Cd） respectively with good repeatability. The sensor has been applied to detect Pb^2＋ （0.1 rag/L） and Cd^2＋ （0. 025 mg/L） in Orange juice with satisfactory results.

关 键 词：铋阵列电极 重金属离子 铅 镉 溶出伏安法 

分 类 号：TS207.3[轻工技术与工程—食品科学] O657.1[轻工技术与工程—食品科学与工程]