Development of an electrochemically reduced graphene oxide modified disposable bismuth film electrode and its application for stripping analysis of heavy metals in milk

被引:154
|
作者
Ping, Jianfeng [1 ]
Wang, Yixian [1 ]
Wu, Jian [1 ]
Ying, Yibin [1 ]
机构
[1] Zhejiang Univ, Coll Biosyst Engn & Food Sci, Hangzhou 310058, Zhejiang, Peoples R China
基金
中国博士后科学基金;
关键词
Electrochemically reduced graphene oxide; Anodic stripping voltammetry; Screen-printed electrode; Heavy metals; Milk; SCREEN-PRINTED ELECTRODES; TRACE-ELEMENTS; CADMIUM; SAMPLES; LEAD; NANOCOMPOSITE; SPECTROMETRY; VOLTAMMETRY; REDUCTION; IONS;
D O I
10.1016/j.foodchem.2013.11.026
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
A novel electrochemical sensing platform based on electrochemically reduced graphene oxide film modified screen-printed electrode was developed. This disposable electrode shows excellent conductivity and fast electron transfer kinetics. By in situ plating bismuth film, the developed electrode exhibited well-defined and separate stripping peaks for cadmium and lead. Several parameters, including electrolytes environment and electrodeposition conditions, were carefully optimized to achieve best stripping performance. The linear range for both metal ions at the disposable bismuth film electrode was from 1.0 mu g L-1 to 60.0 mu g L-1. The detection limit was 0.5 mu g L-1 for cadmium ion and 0.8 mu g L-1 for lead ion. Milk sample analysis demonstrates that the developed electrode could be effectively used to detect low levels (mu g L-1) of cadmium ion and lead ion. Graphene based disposable bismuth film electrode is a sensitive, stable, and reliable sensing platform for heavy metals determination. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:65 / 71
页数:7
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