▎ 摘　　要

NOVELTY - Magnetic molecularly imprinted polymer material is prepared by polymerizing catechins, functionalized iron oxide nanoparticles and acrylic monomers, and then removing catechins. The functionalized ferroferric oxide nanoparticles are ferroferric oxide nanoparticles modified by silane coupling agent. USE - Magnetic molecularly imprinted polymer material. ADVANTAGE - The magnetic molecularly imprinted polymer material has higher sensitivity and wider linear range for the detection of catechins, good application prospect, combines the advanced electrochemical performance of GO and ZIF-8 and specific enrichment ability of mMIP. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a modified electrode, which is manufactured by surface modification of glassy carbon electrode with functional materials, functional material includes graphene-based substances, ZIF-8 and magnetic molecularly imprinted polymer material; and (2) a method for performing electrochemical detection method of catechin solution, which involves using modified electrode as working electrode, using cyclic voltammetry or differential pulse voltammetry to detect the sample solution to be tested, and obtaining content of catechins according to electrical signal analysis.