▎ 摘　　要

NOVELTY - Preparing acetamiprid molecularly imprinted electrochemical sensor based on the screen-printed carbon electrode modified with graphene involves performing electropolymerization to form molecularly imprinted polymer in acidic sodium sulfate solution of methylene blue and acetamiprid. The detection limit of the molecularly imprinted electrochemical sensor prepared by the method for acetamiprid is 1.7x 10-7 mol/L, and the linear range is 1x 10-6 mol/L-2x 10-5 mol/L. The preparation method involves washing the screen-printed carbon electrode with acetone, ethanol and deionized water in order for multiple minutes, and scanning the electrode in potassium ferricyanide to obtain a reversible cyclic voltammetry peak, which proves that the electrode is processed well. The dispersed graphene suspension is dropped onto the screen-printed carbon electrode to form a uniform dispersion layer, which is dried naturally to obtain a graphene-modified electrode. USE - Method for preparing acetamiprid molecularly imprinted electrochemical sensor based on screen-printed carbon electrode modified with graphene. ADVANTAGE - The detection limit of molecularly imprinted electrochemical sensor prepared by the method for acetamiprid is 1.7x 10-7 mol/L, and the linear range is 1x 10-6-2x 10-5 mol/L. The molecularly imprinted electrochemical sensor prepared by the method has good stability and selectivity, and the preparation method is simple and practical. DETAILED DESCRIPTION - Preparing acetamiprid molecularly imprinted electrochemical sensor based on the screen-printed carbon electrode modified with graphene involves performing electropolymerization to form molecularly imprinted polymer in acidic sodium sulfate solution of methylene blue and acetamiprid. The detection limit of the molecularly imprinted electrochemical sensor prepared by the method for acetamiprid is 1.7x 10-7 mol/L, and the linear range is 1x 10-6 mol/L-2x 10-5 mol/L. The preparation method involves washing the screen-printed carbon electrode with acetone, ethanol and deionized water in order for multiple minutes, and scanning the electrode in potassium ferricyanide to obtain a reversible cyclic voltammetry peak, which proves that the electrode is processed well. The dispersed graphene suspension is dropped onto the screen-printed carbon electrode to form a uniform dispersion layer, which is dried naturally to obtain a graphene-modified electrode. Methylene blue and acetamiprid are dissolved in an acidic sodium sulfate solution and mixed uniformly. The molar ratio of methylene blue and acetamiprid is 1:3-6:3. The previously mixed solution is used as an electrolyte solution, and graphene-modified electrode is placed in the mixed solution. Cyclic voltammetry is used for electrochemical polymerization to form molecularly imprinted polymers. The acetamiprid template molecule is washed away with isobutanol/acetic acid solution to obtain a molecularly imprinted electrochemical sensor of acetamiprid.