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چکیده
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The simultaneous detection of trace metal ions at very low concentration levels using inexpensive, fast and easily operative instrumentation is interesting topic because these methods can save time; reduce the cost of analysis and has the ability to analyze multi-elements [1]. Stripping analysis has been demonstrated to show significant sensitivity toward heavy metal ions detection. Anodic stripping voltammetry (ASV) is the most effective and widely used technique, in which the heavy metal ions were predeposited onto the electrode surface and afterward detected by stripping step [2,3]. Here in, a sensitive electrochemical platform for the simultaneous determination of Cd2+, Pb2+, Cu2+ and Hg2+ ions. has been constructed based on montmorillonite (MMT)/NiO/ZnO modified glassy carbon electrode using anodic stripping voltammetry (ASV). The morphology and properties of electrode surface were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) techniques. Under the optimal conditions, the limit of detection was estimated to be 0.34, 0.12, 0.07, 0.22 μg L-1 for Cd2+, Pb2+, Cu2+ and Hg2+, respectively. References: [1] S. Addisu Kitte, S. Li,A. Nsabimana, W. Gao, J. Lai, Z. Liu, G.Xu, Talanta,2019, 191, 485. [2] B. Devadas, M.Sivakumar, S. M. Chen, M. Rajkumar, C.C. Hu, Electroanalysis, 2015, 27, 2629.
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