▎ 摘　　要

NOVELTY - An electrochemical sensor based chitosan/graphene oxide/copper(II) ion-imprinted polymer electrode preparing method involves dissolving shell poly chitosan powder in acetic acid solution, stirring and dissolving uniformly and collecting the supernatant by centrifugation to obtain a chitosan solution, mixing soluble copper salt, graphene oxide dispersion and chitosan solution, stirring and dissolving to make chitosan/graphene oxide/copper(II) complex solution, pipetting chitosan/graphene oxide/copper(II) complex solution onto the surface of the electrode and drying it at room temperature to form a film, placing the electrode in a solution epichlorohydrin, carrying out the reaction, after the polymerization reaction is completed, taking out the electrode and rinsing with deionized water, removing the unreacted epichlorohydrin, immersing in the EDTA solution to completely elute the template ions, and finally rinsing with deionized water and air-drying to obtain the finished product. USE - Method for preparing electrochemical sensor based chitosan/graphene oxide/copper(II) ion-imprinted polymer electrode. ADVANTAGE - The method enables preparing electrochemical sensor based chitosan/graphene oxide/copper(II) ion-imprinted polymer electrode with high selectivity, sensitivity, better repeatability and reproducibility, in simple, easy and cost effective manner. DETAILED DESCRIPTION - An electrochemical sensor based chitosan/graphene oxide/copper(II) ion-imprinted polymer electrode preparing method involves dissolving 0.1-1 g shell poly chitosan powder in 10-50 mL of 1-5 wt% acetic acid solution, stirring and dissolving uniformly and collecting the supernatant by centrifugation to obtain a chitosan solution, mixing 50-100 mg soluble copper salt, 1.1-25 mL mass concentration of 9-10 mg/mL graphene oxide dispersion and chitosan solution, stirring and dissolving to make chitosan/graphene oxide/copper(II) complex solution, pipetting 2-5 mu l chitosan/graphene oxide/copper(II) complex solution onto the surface of the electrode and drying it at room temperature to form a film, placing the electrode in a solution of 2-10 wt.% epichlorohydrin, carrying out the reaction at a temperature of 40-65 degrees C for 2-4 hours, after the polymerization reaction is completed, taking out the electrode and rinsing with deionized water, removing the unreacted epichlorohydrin, immersing in the EDTA solution to completely elute the template ions, and finally rinsing with deionized water and air-drying to obtain the finished product, where the product is utilized as a working electrode in combination with a three-electrode electrochemical workstation for copper(II) detection and used as a copper(II) electrochemical sensor.