A nanocarbon paste electrode modified with nitrogen-doped graphene for square wave anodic stripping voltammetric determination of trace lead and cadmium

被引：0
作者：
Xinsheng Liu
Zhaojun Li
Runmei Ding
Binbin Ren
Yonghong Li
机构：
[1] Ningxia Medical University,School of Basic Medical Sciences
[2] Ningxia Medical University,School of Nursing
[3] Ningxia Medical University,Electrochemistry and Spectroscopy Analysis Laboratory, School of Public Health and Management
来源：
Microchimica Acta | 2016年 / 183卷
关键词：
Electrochemical impedance spectroscopy; Cyclic voltammetry; Nyquist plot; Hexacyanoferrate; Lake water analysis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A nano-carbon paste electrode was modified with nitrogen doped graphene and applied to square wave anodic stripping voltammetric determination of lead(II) and cadmium(II). The modified electrode was investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Key parameters affecting the performance of the sensor such as pH value, content of modifier, deposition potential and time were optimized. Under optimized conditions, the electrode exhibits linear response to lead (at about −0.56 V) and cadmium (at about −0.77 V) in the range between 10 pM to 1 nM, and the detection limits are 8.0 pM for cadmium(II) and 5.0 pM for lead(II), respectively. The sensitivity, selectivity and simplicity of the method are comparable to, or even better than those reported earlier.
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页码：709 / 714
页数：5
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