Graphene Oxide-Modified Electrode Coated with in-situ Antimony Film for the Simultaneous Determination of Heavy Metals by Sequential Injection-Anodic Stripping Voltammetry
Graphene Oxide-Modified Electrode Coated with in-situ Antimony Film for the Simultaneous Determination of Heavy Metals by Sequential Injection-Anodic Stripping Voltammetry
复制标题
DOI：
10.1002/elan.201600568
复制
发表时间：
2017-04-01
期刊：
影响因子：
3
通讯作者：
Chuanuwatanakul, Suchada
中科院分区：
文献类型：
--
作者：
Ruengpirasiri, Prasongporn;Punrat, Eakkasit;Chuanuwatanakul, Suchada
所提出的化学修饰电极是通过Hummer方法合成的氧化石墨烯，然后通过原位电沉积还原锑膜。实验过程可归纳为三个主要步骤：锑膜的制备、分析物离子在电极表面的还原和方波阳极溶出伏安法条件下的溶出步骤。建立了一种简单、快速的连续进样（SI）-锑-氧化石墨烯修饰丝网印刷碳电极（SbF-GO-SPCE）伏安法同时测定重金属的方法。研究了氧化石墨烯、锑和测量参数对测量结果的影响。在最佳条件下使用SI-SWASV，所提出的电极平台在0.1 - 1.5M范围内表现出线性。计算的检测限分别为0.054，0.026，0.060，和0.066 M的镉（II），铅（II），铜（II）和汞（II），分别。将优化后的方法应用于真实的水样中重金属的测定，回收率在94.29 - 113.42%之间，准确度可接受。
The proposed chemically modified electrode was graphene oxide that was synthesized via Hummer's method followed by reduction of antimony film by in-situ electrodeposition. The experimental process could be concluded in three main steps: preparation of antimony film, reduction of analyte ions on the electrode surface and stripping step under the conditions of square wave anodic stripping voltammetry (SWASV). A simple and rapid approach was developed for the determination of heavy metals simultaneously based on a sequential injection (SI), an automated flow-based system, coupled with voltammetric method using antimony-graphene oxide modified screen-printed carbon electrode (SbF-GO-SPCE). The effects of main parameters involved with graphene oxide, antimony and measurement parameters were also investigated. Using SI-SWASV under the optimal conditions, the proposed electrode platform has exhibited linear range from 0.1 to 1.5M. Calculated limits of detection were 0.054, 0.026, 0.060, and 0.066 M for Cd(II), Pb(II), Cu(II) and Hg(II), respectively. In addition, the optimized method has been successfully applied to determine heavy metals in real water samples with acceptable accuracy of 94.29 - 113.42% recovery.