College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China.
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China.
Food Chem. 2014 May 15;151:65-71. doi: 10.1016/j.foodchem.2013.11.026. Epub 2013 Nov 17.
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 μg L(-1) to 60.0 μg L(-1). The detection limit was 0.5 μg L(-1) for cadmium ion and 0.8 μg L(-1) for lead ion. Milk sample analysis demonstrates that the developed electrode could be effectively used to detect low levels (μg 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.
一种基于电化学还原氧化石墨烯薄膜修饰的丝网印刷电极的新型电化学传感平台被开发出来。这种一次性电极具有优异的导电性和快速的电子转移动力学。通过原位镀铋膜，所开发的电极对镉和铅表现出了良好的分辨和分离的溶出峰。仔细优化了包括电解质环境和电沉积条件在内的多个参数，以获得最佳的溶出性能。两种金属离子在一次性铋膜电极上的线性范围均为 1.0 μg L(-1)至 60.0 μg L(-1)。镉离子的检测限为 0.5 μg L(-1)，铅离子的检测限为 0.8 μg L(-1)。牛奶样品分析表明，所开发的电极可有效用于检测低浓度（μg L(-1)）的镉离子和铅离子。基于石墨烯的一次性铋膜电极是一种用于重金属测定的灵敏、稳定和可靠的传感平台。
