分析化学2012，Vol.40Issue(12)：1791-1796,6.DOI:10.3724/SP.J.1096.2012.20470
基于纳米金修饰的两种无汞型重金属微传感器的对比研究
Comparison of Mercury-free Microsensors Based on Gold Nanoparticles for Heavy Metals Detection
摘要
Abstract
This paper presents two kinds of mercury-free electrochemical microsensors for simultaneous detection of heavy metals, which are L-aspartic acid/L-cysteine/gold nanoparticles ( Asp/Cys/GNPs/ microelectrode chip) and Sn film/gold nanoparticles modified microelectrode chip (Sn/GNPs/microelectrode chip). Electrochemical analysis of metal ions on Asp/Cys/GNPs/microelectrode chip was investigated by square wave voltammetry under the optimized conditions. The microsensor exhibited wide linear range from 5 μg/L to 2000 μg/L for Cu2+ and Pb2+ ions, with limit of detection of 1 μg/L. In situ tin film deposition was used in detection of heavy metals for the forming of alloy with heavy metals. Electrochemical analysis of metal ions on Sn/GNPs/microelectrode chip was investigated by square wave stripping voltammetry. The Sn/GNPs/microelectrode chip showed high sensitivity to Cu2+ , Pb2+ and Zn2+ ions. This microsensor revealed good linear behavior in the examined concentration ranges from 5 to 500μg/L for Cu2+ and Pb2+ , from 10 to 500 μg/L for Zn2+ , with a limit of detection of 2 ng/L for Cu2+ , 3 μg/L for Pb2+ and 5μg/L for Zn2+ . In addition, metal ions detection method using the two kinds of microsensor are green, simple, reused and compatible with the microfluid chip for on-site analysis.关键词
纳米金/微传感电极芯片/铜/铅/锌Key words
Gold nanoparticles/ Microelectrode chip/ Copper/ Lead/ Zinc引用本文复制引用
王晋芬,边超,佟建华,孙楫舟,夏善红..基于纳米金修饰的两种无汞型重金属微传感器的对比研究[J].分析化学,2012,40(12):1791-1796,6.基金项目
本文系国家重点基础研究发展规划"973"项目(No.2009CB320300)资助 （No.2009CB320300）
