A novel electrochemical sensor for the sensitive and selective detection of methionine (Met) has been developed, utilizing copper (II)phthalocyanine (CuPc)-gold nanoparticles (AuNPs)– modified carbon paste electrode (CPE). This sensor was thoroughly characterized using a combination of techniques including cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Cyclic voltammetr...