مشخصات پژوهش

This study reports a sensitive, reproducible and fast voltammetric Bisphenol A (BPA) sensor based on graphenized pencil lead electrode (GPLE). The GPLE was prepared by electrochemical exfoliation of pencil lead electrode (PLE) by applying an optimized potential in acidic media. The prepared GPLE was characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and electrochemical techniques. Active surface area and electron transfer rate of the prepared GPLE was improved remarkably in comparison with regular pencil lead electrode. In order to evaluate the electrocatalytic performance of the GPLE, determination of Bisphenol A in canned food and plastic bottled drinking water was studied in details using differential pulse voltammetry (DPV) technique. The fabricated sensor responds efficiently to BPA over the concentration range of 5 to 700 nM with the detection limit of 0.82 nM and sensitivity of 14 A M−1. Low cost, simplicity of fabrication, renewability, high sensitivity and accuracy makes this electrode as a suitable choice for rapid determination of BPA in routine and clinical analysis.