Fabrication of CuO nanoparticle/ionic liquid modified carbon paste electrode: Application for simultaneous determination of hydrazine and bisphenol A in water samples

In the present research, we report the application of synthesized copper oxide nanoparticles toghether with n-hexyl-3-methylimidazolium hexa-fluoro-phosphate in the constructuion of the modified carbon paste electrode (CuO/NP/IL/CPE) as high sensitive electrochemical sensor for simultaneous determination of hydrazine (HY) and bisphenol A (BPA). The electrochemical properties of CuO/NP/IL/CPE was carefully studied in aqueous media, using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), chronoamperometry and differential pulse voltammetry (DPV). The electron transfer coefficient (α), diffusion coefficient (D), and electron transfer resistant (Ret) of HY at the modified electrode were calculated. The experimental results show that, under optimized conditions, the modified electrode promoted electron transfer reaction for the oxidation of HY and BPA. The linear dynamic range were obtained in the ranges of 0.05– 150 and 0.2–175 μmol L-1 with the detection limits (3sb/m) 0.03 and 0.1 μmol L-1 for HY and BPA, respectively. Finally, this new sensor was used for simultaneous determination of HY and BPA in some water samples such as river water and wastewater using the standard addition method.