Electrochemical Sensor for Bisphenol A Based on Molecular Imprinting Technique and Electropolymerization Membrane
By the approach of self-assembly and electropolymerization,membrane for Bisphenol A(BPA)has been synthesized with bisphenol A as template molecule,o-aminothiophenol as functional monomer.Based on which,an electrochemical sensor was constructed and its response to BPA was evaluated by cyclic voltammetry.The peak current intensity was linear to Bisphenol A in the range of 6.0×10-7-5.5×10-5 mol/L with a detection limit of 2.0×10-7 mol/L and the RSD 5%(n=9).The response time of stable current was about 2 min.The proposed sensor exhibits good selectivity,reproducibility and stability.The AC impedance technology and chronoamperometry were employed to study the electrochemical characteristic of the membrane.The sensor was successfully applied to the determination of BPA in several samples.