▎ 摘　　要

A robust electrochemical sensing platform based on graphene oxide-copper terephthalate (GO/Cu-tpa) composite has been fabricated. The prepared composite was characterized through FTIR, XRD, SEM, and EDS techniques. The electrochemical characterization of the composite was studied after immobilizing the composite material as a thin film on the glassy carbon electrode through voltammetry techniques. The fabricated electrode exhibited an excellent electrocatalytic activity in the oxidation of nitrite. The sensor showed a linear response in the concentration range 5 - 625 mu M with a detection limit of 0.3 mu M and sensitivity of 0.86 +/- 0.06 mu A mu M-1 cm(-2). The electrochemical sensor was validated by measuring the trace level nitrite from water samples, and the results are in good agreement with the standard protocol. Schematic representation of GO/Cu-terepthalate composite preparation and fabrication of nitrite sensor