Impedimetric detection of an endocrine disruptor (bisphenol A) based on an organophosphorus compound (TBP) as a receptor

Purpose The purpose of this paper is to study the detection of an endocrine disruptor bisphenol A (BPA), present in aqueous solution by electrochemical impedance spectroscopy. Design/methodology/approach A polymeric membrane and an ion-sensitive electrode (a silica electrode) are spatially coupled to form the current sensor. The preparation of the polymeric membrane involves the incorporation of an ionophore (TBP), a polymer based on siloprene K1000 and a plasticizer based on siloprene crosslinking K11. Characterization, sensibility and the selectivity of this sensor have been evaluated by impedance spectroscopy. Findings A layer of tributyl-phosphate deposited on silica electrode has been characterized by impedance spectroscopy method. Under the optimal experimental conditions, a number of significant factors were optimized. The method exhibited good linearity in the range of 10–3 to 10–10 ppm with a good correlation coefficient of 0.974 and the detection limit is around 10–11 ppm, indicating the sensitivity, reproducibility and long-term stability of the sensor overlooked the target element. Practical implications The practical implication of electrochemical sensors lies to their ability to provide rapid, sensitive and cost-effective detection of BPA in food safety monitoring, environmental surveillance and public health protection. Originality/value The result of this study demonstrate that the proposed sensor offers a convenient and reproducible method. It shows strong potential to rival conventional analytical techniques, particularly in terms of speed, stability and economic feasibility.