▎ 摘　　要

NOVELTY - Poly(3-methylthiophene)/nitrogen-doped graphene (P3MT/N-GE) modified glassy carbon electrode is formed by preparing N-GE dispersion liquid, coating on polished glassy carbon electrode surface, evaporating the volatile solvent to obtain sensitive film-coated N-GE modified glassy carbon electrode, dropping pure P3MT monomer in nitrile solution containing lithium perchlorate, ultrasonically processing to obtain monomer mixed solution, placing the sensitive film-coated N-GE modified glassy carbon electrode in the monomer mixed solution, and conducting cyclic voltammetry polymerization. USE - P3MT/N-GE modified glassy carbon electrode used for detecting phoxim pesticide (claimed). ADVANTAGE - The P3MT/N-GE modified glassy carbon electrode has simple and environment-friendly preparation, low cost, high sensitivity, wide linear range, good repeatability, and high stability, and achieves lowest detection limit of 0.002 mu mol/L. DETAILED DESCRIPTION - P3MT/N-GE modified glassy carbon electrode is formed by diluting nitrogen-doped graphene with N,N-dimethylformamide and ultrasonically dispersing to obtain N-GE dispersion liquid, coating the N-GE dispersion liquid on polished glassy carbon electrode surface, evaporating the volatile solvent to obtain sensitive film-coated N-GE modified glassy carbon electrode, dropping pure P3MT monomer in nitrile solution containing lithium perchlorate, ultrasonically processing for half an hour to obtain monomer mixed solution, placing the sensitive film-coated N-GE modified glassy carbon electrode in the monomer mixed solution, and conducting cyclic voltammetry polymerization at 0.2-1.7 V for 5-30 rings at scanning rate of 100 mV/s to obtain the product. An INDEPENDENT CLAIM is included for detection of phoxim pesticide using P3MT/N-GE modified glassy carbon electrode comprising placing the P3MT/N-GE modified glassy carbon electrode in buffer solution having a pH of 3-7, adding phoxim, and using cyclic voltammetry and scanning speed of 20-160 mV/s for detecting the electrochemical response.