Electrochemical Impedance Spectroscopy Analysis of Copper Electrodes Coated with Au@LaFeO₃ in a Polypyrrole Matrix for Acetaminophen Detection

Abstract

Environmental contamination by pharmaceuticals is a growing problem that requires innovative solutions for detection. This study aims to develop a nanomaterial-based electrochemical sensor for acetaminophen detection in water bodies. An electrode modified with lanthanum orthoferrite and gold nanoparticles was evaluated as a sensing platform employing electrochemical impedance spectroscopy and cyclic voltammetry techniques. The results showed that the sensor can detect acetaminophen in micromolar concentrations, highlighting the potential of the nanocomposite for biosensor applications.