Determination of viloxazine by differential pulse voltammetry with boron-doped diamond electrode

Abstract

Abstract: This paper presents a novel, high sensitive analytical method for electrochemical determination of viloxazine at boron-doped diamond electrode using differential pulse voltammetry (DPV). The verification of viloxazine electrochemical behavior proved that viloxazine undergoes diffusion controlled, one-electron irreversible oxidation process. Optimization stage allowed for selection of acetate buffer solution (pH 5; 0.1 mol dm−3) as the best suitable supporting electrolyte and determination of DPV parameters. The calibration curve was obtained in the concentration range 0.1–20.0 µmol dm−3 with the detection limit equal to 0.04 µmol dm−3, respectively. The optimized procedure was validated by studying the sensitivity, accuracy, and precision of obtained results. The proposed method was successfully employed for viloxazine determination in spiked tap and river water samples with recovery of 95.8–98.8%. Graphical abstract: [Figure not available: see fulltext.].