▎ 摘　　要

NOVELTY - Preparation of flumorpholine molecularly imprinted electrochemical sensor involves ultrasonically washing the screen-printed carbon electrode with acetone, ethanol and deionized water, scanning the electrode in potassium ferricyanide to obtain a reversible cyclic voltammetry peak, dropping the dispersed graphene suspension onto the screen-printed carbon electrode to form a uniform dispersion layer, and drying naturally to obtain a graphene-modified electrode, dissolving 2-mercaptobenzimidazole and flumorpholine in an acidic sodium sulfate solution and mixing evenly, and using the previously mixed solution as an electrolyte solution, placing the graphene-modified electrode in the mixed solution, electrochemically polymerizing by cyclic voltammetry to form a molecularly imprinted polymer, and washing the fluorine with an isobutanol/acetic acid solution morpholine template molecule to obtain a molecularly imprinted electrochemical sensor of flumorpholine. USE - Preparation of flumorpholine molecularly imprinted electrochemical sensor. ADVANTAGE - The method is simple, practical, and produces molecularly imprinted electrochemical sensor having excellent stability and selectivity. DETAILED DESCRIPTION - Preparation of flumorpholine molecularly imprinted electrochemical sensor involves electropolymerizing in the acidic sodium sulfate solution of 2-mercaptobenzimidazole and flumorpholine based on a screen-printed carbon electrode modified with graphene. The flumorpholine has detection limit of 2.3x 10-7 mol/L, and linear range of 3.5x 10-6-6.5x 10-5 mol/L. The preparation method involves (i) ultrasonically washing the screen-printed carbon electrode with acetone, ethanol and deionized water, respectively, for several minutes, and scanning the electrode in potassium ferricyanide to obtain a reversible cyclic voltammetry peak, which proves that the electrode is processed well, dropping the dispersed graphene suspension onto the screen-printed carbon electrode to form a uniform dispersion layer, and drying naturally to obtain a graphene-modified electrode, (ii) dissolving 2-mercaptobenzimidazole and flumorpholine in an acidic sodium sulfate solution and mixing evenly, and (iii) using the previously mixed solution as an electrolyte solution, placing the graphene-modified electrode in the mixed solution, electrochemically polymerizing by cyclic voltammetry to form a molecularly imprinted polymer, and washing the fluorine with an isobutanol/acetic acid solution morpholine template molecule to obtain a molecularly imprinted electrochemical sensor of flumorpholine. The molar ratio of 2-mercaptobenzimidazole and flumorpholine is 1:2-6:2.