Preparation method and application of highly selective chlorsulfuron magnetic molecularly imprinted polymer

A magnetic molecular imprinting, high-selectivity technology, applied in chemical instruments and methods, analytical materials, material separation, etc., can solve the problems of incomplete removal of templates, poor accessibility of imprinting sites, and large diffusion resistance, etc., to achieve efficient separation And enrichment, fast desorption rate, simple preparation method
CN111269418BActive Publication Date: 2022-02-22QILU UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QILU UNIV OF TECH
Publication Date
2022-02-22

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Abstract

The invention relates to a preparation method and application of a highly selective chlorsulfuron magnetic molecularly imprinted polymer. When preparing the molecularly imprinted polymer, magnetic graphene oxide is used as a carrier, chlorsulfuron is used as a template, and it is prepared based on the self-polymerization of dopamine in an alkaline environment. Compared with the traditional method for preparing molecularly imprinted polymers, the method of the present invention does not need to introduce biotoxic cross-linking agents and initiators, and the entire synthesis is carried out in aqueous solution at ambient temperature, which is environmentally friendly. The obtained magnetic molecularly imprinted polymer has remarkable selective recognition performance for chlorsulfuron, higher adsorption capacity, faster equilibration time and desorption rate. As an adsorbent material, it is applied to the specific identification, efficient separation and enrichment of sulfonylurea herbicide residues in grain samples under the condition of external magnetic field. At the same time, the polymer material can be recycled many times, which reduces the detection cost and has good practical application value.
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Description

technical field

[0001] The invention belongs to the field of material preparation technology and trace pollutant residue detection in food, and in particular relates to a preparation method and application of a chlorsulfuron magnetic molecularly imprinted polymer. Background technique

[0002] Sulfonylurea herbicides are a kind of farmland herbicides with high efficiency, low toxicity, low dosage and low residue. They are the second largest species after amino acid herbicides such as glyphosate. They are widely used in rice fields, soybean fields, corn fields For the control of weeds in fields and wheat fields, chlorsulfuron-methyl, metsulfuron-methyl, thifensulfuron-methyl, bensulfuron-methyl, pyrazosulfuron-methyl, etc. are commonly used. Sulfonylurea herbicides are extremely water-soluble, easily enter the soil, cause water pollution, and cause harm to the human body through enrichment and transfer through the food chain, causing hypoglycemia reactions, nausea and vomitin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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