The present work examines the influence of bisphenol A on the facilitated transfer of K+ by dibenzo-18-crown-6 across the water|1,2-dichloroethane interface. Electrochemical studies are conducted by Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The results indicate that bisphenol A does not partition into the aqueous phase, but remains at the interface, where it inhibits the phase-transfer of K+. The transfer current of this cation decreases as the concentration of bisphenol A in the organic phase increases. CV and EIS studies indicate that bisphenol A absorbs on the organic side of the interface, where it decreases the active area and blocks K+ transport. The results of this work can serve as a model to understand interfacial ion transfer in biological membranes and the potential behavior of BPA in living systems.
Keywords: ITIES, AC impedance, DB18C6, Bisphenol A, Ion Transfer