Construction method of electrochemical sensor for rapidly and quantitatively detecting pesticide residues

Abstract

The invention discloses a construction method of an electrochemical sensor for rapidly and quantitatively detecting pesticide residues, relates to the technical field of food safety detection and analysis, overcomes the defects of various existing methyl parathion detection technologies, and has the advantages of low detection limit, rapidness and accuracy in detection, convenience in carrying, less required equipment, low cost and the like. According to the specific scheme, the construction method comprises the following steps of S1, carrying out self-assembly on 4-aminothiophenol on a sulfhydrylated graphene modified silk-screen printing electrochemical sensor; S2, self-assembling methyl parathion on the sulfhydrylated graphene modified silk-screen printing electrochemical sensor; and S3, preparing a sulfhydrylated graphene loaded gold platinum nanoparticle modified molecularly imprinted silk-screen printing electrochemical sensor: preparing the methyl parathion molecularly imprintedpolymer electrochemical sensor by adopting an electro-polymerization method. The construction method of the electrochemical sensor for rapidly and quantitatively detecting pesticide residues providesa miniature pesticide residue detection chip which is rapid, sensitive, portable, low in cost and easy to operate.

Description

technical field

[0001] The invention relates to the technical field of food safety detection and analysis, more specifically, it relates to a construction method of an electrochemical sensor for rapid quantitative detection of pesticide residues. Background technique

[0002] At present, conventional detection methods for pesticide residues include: chromatography, spectroscopy, biochemical methods, etc. Gas chromatography, high performance liquid chromatography, and gas-mass spectrometry are widely used in laboratory testing. Although the test results are accurate, the required instruments are expensive, the sample processing and testing cycle is long, and the operation is cumbersome and time-consuming. Analysts have high technical requirements and are not suitable for on-site testing. Spectroscopic detection of organophosphorus pesticides has a limited range, background light source, low sensitivity, narrow concentration range, and poor selectivity. It is generally used a...

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