▎ 摘　　要

A nitrite electrochemical sensor based on electrodeposition of zirconium dioxide nanoparticles on reduced graphene oxide modified electrode was successfully constructed for the detection of nitrite. The electrochemical behavior of the modified electrode was investigated by cyclic voltammetry and amperometric i-t curve. Under the optimal conditions, the amperometric i-t curve response of the electrode showed a linear relationship with nitrite concentration in the range of 3. 0. 10(-7) - 1. 0 x 10(-6) mol/L and 1. 0 x 10(-6) - 6. 0 x 10(-6) mol/L, and the detection limit was 1. 0 x 10(-7) mol/L (S/N = 3). The fabricated sensor exhibited high sensitivity, good stability and high reproducibility. This sensor was applied for the detection of nitrite in sausage samples with favorable recoveries of 93. 7% - 110. 4% and relative standard deviation (RSD) of 1. 6% - 2. 1%.