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An analytical method for the determination of Flubendiamide (FBD) was investigated for the first time in this study using disposable pencil graphite electrodes (PGE). A detailed study of the electrochemical properties of FBD was carried out in phosphate buffer solution (PBS, pH 7.0). The results showed a well-defined reversible system result from the transformation of FBD to the corresponding hydroxyl-derivative. The results showed a linear range from 1 to 500 µM (R2 = 0. 9952), as well as detection limit of 0.53 µM. The PGE sensor was successfully applied for the detection of FBD in wastewater and white rice. [ABSTRACT FROM AUTHOR]

Flubendiamide (FBD) is one of the compounds whose environmental impact of its decomposition products is still being studied in-depth, as it poses a significant hazard to the ecological environment and human health. Therefore, it is critical and essential to create a fast, easy, and sensitive method for detecting FBD in food and surface water samples. In this paper, a simple, economical, selective, and sensitive electrochemical sensor is proposed for the detection of FBD in surface water and white rice samples. It consists of a pencil graphite electrode (PGE) modified with Chitosan (CHI). The developed electroanalytical method was performed with cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The different parameters influencing the cathodic peak current of FBD were optimized. After optimization, the sensor showed wide linear responses in the range from 5.0 × 10−7 mol L−1 to 1.0 × 10−5 mol L−1 of FBD concentration and provided a detection limit of 5.0 × 10−8 mol L−1. The PGE/CHI has good anti-interference properties, stability, and reproducibility due to the synergistic effect between PGE and CHI. The proposed sensor enabled the practical application of sensitive FBD detection in surface water and white rice samples with good recovery rates. [Display omitted] • Organic polymer modified pencil graphite electrodes (PGE/CHI) were prepared. • Electrochemical detection of FBD insecticides was performed by DPV and EIS techniques. • Reaction mechanism of FBD at PGE/CHI electrode has been discussed. • Proposed sensor was applied to determine FBD in water and white rice samples. [ABSTRACT FROM AUTHOR]