Abstract
This paper presents a thermally reduced graphene/clay/chitosan modified pencil electrode for ultrasensitive detection of Flubendiamide using differential pulse voltammetry. The graphene oxide was synthesized by exfoliation of graphite with an eco-friendly procedure. The as-produced reduced graphene/clay/chitosan composite is characterized by utilizing Fourier transform infrared spectroscopy and Scanning electron microscopy. The electrochemical behavior of the electrode before and after modification was investigated by cyclic voltammetry. Under optimized conditions, the reduced graphene/clay/chitosan modified pencil electrode exhibited excellent analytical properties toward Flubendiamide determination using differential pulse voltammetry. A linear calibration curve was established from 0.02 to 15 μmol L−1 for Flubendiamide with a limit of detection of 0.001 μmol L−1. The method was effectively employed for Flubendiamide detection in white rice samples.
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