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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
铋阵列电极
重金属离子
铅
镉
溶出伏安法
Bismuth array
Lead
Cadmium
Adsorptive stripping voltammetry
作者简介
Email：jinqh@mail．sim．ac.cn
