▎ 摘　　要

NOVELTY - An imidacloprid detecting method involves preparing graphene oxide modified glassy carbon electrode by diluting graphene oxide with distilled water and dispersing to obtain oxidized graphene dispersion liquid, and coating graphene oxide dispersed droplets in a clean glassy carbon electrode surface, and volatilizing to obtain electrode. The graphene oxide glassy carbon electrode is placed in a modified buffer solution, and nitrogen is introduced followed by adding imidacloprid, using cyclic voltammetry, detecting the electrode electrochemical response of imidacloprid. USE - Method for detecting imidacloprid in onion, tomato, cucumber, celery, and rape vegetable groups, and for food testing. ADVANTAGE - The method enables detecting imidacloprid with good electro-catalytic performance, fast current response, high sensitivity, low detection limit, good reproducibility and stability characteristics, and low production cost, ease of operation, selectivity strong, environmentally friendly and non-toxic to humans. DETAILED DESCRIPTION - An imidacloprid detecting method involves preparing graphene oxide modified glassy carbon electrode by diluting graphene oxide with distilled water to dilute and ultrasonically dispersing to obtain oxidized graphene dispersion liquid, and coating graphene oxide dispersed droplets in a clean glassy carbon electrode surface, volatilizing the clean glassy carbon electrode surface coated with solvent to obtain graphene oxide modified glassy carbon electrode. The graphene oxide glassy carbon electrode is placed in a modified buffer solution, at pH of 2.8-7.5, and nitrogen is introduced for 5-20 minutes, followed by adding imidacloprid, using cyclic voltammetry with scanning rate of 100-200 mV/second, detecting the graphene oxide modified glassy carbon electrode electrochemical response of imidacloprid.