Electrochemical Determination of Bisphenol A at Adenine and Carbon Nanotubes Modified Carbon Paste Electrode

Bisphenol A (BPA), as a major component of polycarbonate and epoxy resins is widely used in the plastic industry. This compound is a well-known endocrine disruptor that can interfere with the normal, hormonal function of human or animal, and thus, pose a potential threat to the environment and human health. The polycarbonate and epoxy resins containing BPA are commonly used to produce baby bottles, food packages, and beverage containers; thus bisphenol A may enter food and the environment. Therefore, developing a simple and highly sensitive analytical method for the determination of BPA is of great importance.

In this study, an electrochemical sensor based on an adenine/carbon nanotube (Adenine/CNT) modified carbon paste electrode (CPE) was proposed for determination of BPA.

The obtained results demonstrate that the modified electrode used in this research had strong catalytic activity toward the oxidation of BPA. Also, applying adenine and carbon nano-tubes in carbon paste electrode resulted in reduction of the electron transfer resistance and significant increase of electron transfer rate.

According to the results, type of the employed modifier has a significant effect on sensitivity and selectivity of detection. Therefore, novel sensing materials with high stability, good catalytic activity and excellent conductivity can improve its measurement process.