Electrochemical detection of Hg（II）in water by graphene cobalt film-modified electrodes

被引：0

作者：

Bai, Xuehua ^{[1
]}

Zhang, Bi ^{[1
]}

Liu, Ying ^{[1
]}

Wang, Ruonan ^{[1
]}

Luo, Lixia ^{[1
]}

机构：

[1] School of Public Health, Baotou Medical College, Inner Mongolia University of Science and Technology, Baotou,014040, China

来源：

Chinese Journal of Analysis Laboratory | 2024年 / 43卷 / 08期

关键词：

Cobalt - Cobalt metallography - Cyclic voltammetry - Electrochemical electrodes - Graphite electrodes;

D O I：

10.13595/j.cnki.issn1000-0720.2023062703

中图分类号：

学科分类号：

摘要：

：The composite film-modified electrode based on graphene and loaded with cobalt particles was constructed by the electrochemical deposition method，which can realize rapid and accurate detection of Hg（II） in water. The fabricated electrode was characterized by electrochemical impedance spectroscopy （EIS），and the electrochemical behavior of Hg（II）on the modified electrode was studied by cyclic voltammetry（CV）. Parameters including the graphene concentration，the modification amount，CoCl2 concentration，buffer type，deposition time， and deposition potential were optimized. Under the optimal conditions，Hg（II）exhibited a good current response on the graphene cobalt film-modified electrode，and there was a linear relationship between the current and Hg（II） concentration in the range of 4.99-498.53 µμmol/L，with a limit of detection of 4.12 µμmol/L. The graphene cobalt film-modified electrode had good anti-interference and selectivity for Hg（II）. The modified electrode was used for the detection of Hg（II） in tap water，and the recoveries were 90.3%-102.6%，indicating the potential applications of the modified electrode in monitoring Hg（II）. © 2024, Youke Publishing Co.,Ltd. All rights reserved.

引用

页码：1132 / 1138