A facial electrochemical approach to determinate bisphenol A based on graphene-hypercrosslinked resin MN202 composite

It first reported a novel electrochemical approach for the in situ determination of bisphenol A (BPA) in the milk and mineralised water using graphene-hypercrosslinked resin MN202 composite (MN202) modified electrode. The electrocatalytic oxidation and electroanalytical of BPA on the modified electrode were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). It is notable that the oxidation peak current of BPA had enhanced remarkably and the oxidation overpotential had decreased significantly. Experimental parameters, such as the accumulation potential and time, scan rate, and the pH value of buffer solution were optimised. Under the optimised conditions, the oxidation peak current was proportional to BPA concentration in a wide range between 0.005 and 20.0 μmol/L, and the detection limit was 1.02 nmol/L (S/N = 3). Moreover, the fabricated electrode also exhibited good reproducibility and stability, and employed to in situ determinate BPA in milk and mineralised water successfully.