This study used a thiolated calix[4]arene derivative modified on gold nanoparticles and screen-printed carbon electrode (TC4/AuNPs/SPCE) for Pb2+ Cu2+ determination. The surface of the was characterised via Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), cyclic voltammetry (CV), electrochemical impedance (EIS). Differential pulse (DPV) detect...