A Sensitive Modified Electrode based on Reduced Graphene Oxide Composite with Cu@SnS/SnO2 for Determination of Benserazide

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Naghian Ebrahim; NAJAFI MOSTAFA; Manafi Mohammad Reza; TORKIAN LEILA

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Journal Paper

Paper Information

Journal: ANALYTICAL AND BIOANALYTICAL ELECTROCHEMISTRY Year:2019 | Volume:11 | Issue:12 Page(s): 1687-1700

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Title

A Sensitive Modified Electrode based on Reduced Graphene Oxide Composite with Cu@SnS/SnO2 for Determination of Benserazide

Author(s)

Naghian Ebrahim | NAJAFI MOSTAFA | Manafi Mohammad Reza | TORKIAN LEILA | Issue Writer Certificate

Keywords

Benserazide

Cu@SnS/SnO2 nanocomposite

Sensing

Voltammetry

Parkinson disease

Abstract

Benserazide (BZ), a dopadecarboxylase inhibitor, is the most widely prescribed drug in treatment of Parkinson’ s disease. Therefore, it is urgent to develop a sensitive and selective BZ sensor. We used tin oxide nanocomposite (Cu@SnS/SnO2) for developing a new electrochemical sensor for determination of BZ in human urine and pharmaceutical tablets. Morphology of the synthesized Cu@SnS/SnO2 was investigated by scanning electron microscopy (SEM). The modified electrode was characterized by electrochemical impedance spectroscopy (EIS) and voltammetric techniques. The sensitivity and limit of detection of RGO/Cu@SnS/SnO2 electrode for BZ are 0. 275 μ Aμ M− 1 in the range of 1-100 μ M and 0. 58 μ M. Moreover, the proposed electrode shows good selectivity, reproducibility and stability. The applicability of the modified electrode was demonstrated by determination of BZ in human urine and pharmaceutical formulation.

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