[1]李昌安,葛存旺,刘战辉,等.L-半胱氨酸修饰金电极测定水中铜离子的研究[J].东南大学学报(自然科学版),2004,34(1):78-81.[doi:10.3969/j.issn.1001-0505.2004.01.018]
 Li Changan,Ge Cunwang,Liu Zhanhui,et al.Determination of copper in water by a L-cysteine modified gold electrode[J].Journal of Southeast University (Natural Science Edition),2004,34(1):78-81.[doi:10.3969/j.issn.1001-0505.2004.01.018]
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L-半胱氨酸修饰金电极测定水中铜离子的研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第1期
页码:
78-81
栏目:
化学化工
出版日期:
2004-01-20

文章信息/Info

Title:
Determination of copper in water by a L-cysteine modified gold electrode
作者:
李昌安 葛存旺 刘战辉 张海黔 顾宁
东南大学分子与生物分子电子学教育部重点实验室, 南京 210096; 东南大学纳米科学与技术中心, 南京 210096
Author(s):
Li Changan Ge Cunwang Liu Zhanhui Zhang Haiqian Gu Ning
Key Laboratory of Molecular and Bio-molecular Electronics of Ministry Education, Southeast University, Nanjing 210096, China
Research Center for Nano-scale Science and Technology, Southeast University, Nanjing 210096, China
关键词:
L-半胱氨酸 修饰金电极 铜离子检测
Keywords:
L-cysteine modified gold electrode determination of copper
分类号:
O657.1
DOI:
10.3969/j.issn.1001-0505.2004.01.018
摘要:
通过共价自组装的方法制得了L-半胱氨酸单分子层修饰金电极,以该修饰电极为工作电极,建立了一种灵敏的、选择性的检测水中痕量铜离子的新方法.在富含铜离子的磷酸缓冲液中搅拌富集,铜离子与修饰电极表面的L-半胱氨酸形成电活性配合物吸附在电极表面.用该电极对不同浓度的铜离子进行电化学检测时发现仅仅是峰电流发生改变,而峰电位不变.峰电流随铜离子浓度的增大而增大,在0.1~30 μmol/L之间出现良好的线性关系.其最低检测限可达5 nmol/L,并对可能的检测机理进行了研究.
Abstract:
A new chemically modified gold electrode was prepared by covalent self-assembled using L-cysteine as a modifier. A new approach was developed for sensitive and selective determination of copper in water by the electrode. An electro-active complex of copper with L-cysteine was formed and accumulated on surface of the electrode while the electrode was immersed into a stirred copper-containing NaH2PO4-Na2HPO4 buffer solution. While the electrode accumulated various concentrations of copper,the electrochemical current changed and the potential remained same. The value of peak current increased linearly with the copper concentration in the range of 0.1 to 30 μmol/L. The detection limit was 5 nmol/L and the mechanism of determination is proposed.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 李昌安(1974—),男,硕士生; 顾宁(联系人),男,博士,教授,博士生导师, guning@seu.edu.cn.
更新日期/Last Update: 2004-01-20