▎ 摘　　要

A novel electrochemical sensor for the detection of nitrite was fabricated by co-deposition of Pt nanoparticles and Fe(III) on reduced graphene oxide (RGO) modified glassy carbon electrode (GCE). Field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), and electrochemical techniques were used to characterize the structure of these nanocomposites. Electrochemical results showed that the Pt-Fe(III)/RGO/GCE exhibited remarkable electrocatalytic activity toward the oxidation of nitrite in phosphate buffer solution (pH 4.0). Under the optimum conditions, the linear range for the detection of nitrite was 4.0x10(-6) to 2.5x10(-4) M and a low detection limit of 6.0x10(-7) M. The proposed method was successfully applied in the detection of nitrite in salt samples.