▎ 摘　　要

NOVELTY - The method involves dissolving or dispersing the target molecule in a solution containing magnetic nanomaterials and polymerized monomers, adsorbing on the surface of the magnetic carrier nano material, initiating the polymerization of monomers and simultaneously bonding the target molecules to the surface of the magnetic carrier nanomaterial, washing and removing the target molecule, to obtain magnetic molecularly imprinted nanomaterial, performing specific enrichment of target molecules, washing and separating magnetic molecularly imprinted nanomaterials to achieve magnetic separation of target molecules, dispersing the magnetic molecularly imprinted nanomaterials, fixing the electroactive substance to the surface of the magnetic molecularly imprinted nanomaterial, detecting the content of the electroactive substance on the probe surface, and realizing the indirect electrochemical quantitative analysis of the target molecule. USE - Method for detecting a magnetic electrochemical nano probe used in industrial and agricultural production process, food safety, environmental pollution analysis, medical detection and life health warning. ADVANTAGE - The method is simple, accurate, low cost, and high efficiency to realize the specific detection of multiple substances, and has wide application value in environmental pollutant, agricultural safety marker, and biochemical molecule and other analysis field. The method improves the detection sensitivity of the electroactive substance, and provides a simple trace or ultra trace target molecule in complex sample, high sensitive field detection, providing a probe type electrochemical quantitative analysis detection method.