摘要
本文建立了一种饮用水源水中痕量溶解态铜离子(Cu^2+)的定性和定量电化学检测方法.该方法首先通过电化学循环伏安法于玻碳电极表面制备粒径约为70 nm的金纳米粒子(Au NPs),然后采用方波阳极溶出伏安法进行待测水样中Cu^2+的定性定量分析.研究结果表明,对于标准溶液,方法的检出限为1.3μg·L^-1,线性范围在2~50μg·L^-1之间,常见重金属离子对其定性定量分析几无影响.在此基础上,将该方法应用于福建省重要的饮用水源水———闽江中游水样中Cu^2+的含量分析,所得测试结果与国家标准方法(石墨炉原子吸收光谱法)无显著性差异,标准偏差在20%以内.本方法具有电极制备简单、测定成本低以及分析快速等优点,进一步优化电极制备方法以提高方法的重现性和定量准确度,将可望用于现场测定各种饮用水源水中的痕量溶解态Cu^2+.
Aiming at the on-site and quick safety evaluation of the dissolved trace copper ions(Cu^2+)in drinking water source,an electrochemical detection platform was developed on the basis of the square wave anodic stripping voltammetry using the gold nanoparticles(Au NPs)modified glassy carbon electrode,where Au NPs were deposited via electrochemical cyclic voltammetry.The proposed method displayed the limit of detection as low as 1.3μg·L^-1in the linear range of 2~50μg·L^-1.The proposed method was applied to the determination of Cu^2+in the midstream of Minjiang River,one of the most important drinking water sources in Fujian province,China.The results were nearly identical to that obtained by the standard method quantitatively with a deviation less than 20%.Furthermore,the proposed electrochemical method is simple,economical and fast,and has the potential for the field determination of trace dissolved Cu^2+in various drinking water sources facilitated with the portable potentiostat.
作者
彭劲骥
郑红
邹义松
刘国坤
袁东星
PENG Jing-ji;ZHENG Hong;ZOU Yi-song;LIU Guo-kun;YUAN Dong-xing(State Key Laboratory of Marine Environmental Science,College of the Environment and Ecology,Xiamen University,Xiamen 361102,Fujian,China;State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry&Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China)
出处
《电化学》
CAS
CSCD
北大核心
2019年第6期699-707,共9页
Journal of Electrochemistry
基金
financially supported by the Natural Science Foundation of China(No.21473140)
the Collaboration Project between Industry and University in Fujian Province(No.2016Y4012)
the Fundamental Research Funds for the Central Universities(No.2072016011).
关键词
电化学检测
方波阳极溶出伏安法
金纳米粒子
痕量铜离子
饮用水
electrochemical determination
square wave anodic stripping voltammetry
gold nanoparticles
trace copper ion
drinking water
