Preparation method of pyraclostrobin molecularly-imprinted polymer

Through molecularly imprinted polymer technology, the problems of insufficient detection sensitivity and environmental impact of pyraclostrobin have been solved, an efficient and environmentally friendly detection method has been realized, and detection sensitivity and efficiency have been significantly improved.

CN104387532AInactive Publication Date: 2015-03-04BEIJING UNIV OF AGRI
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Patent Information

Application Number
CN201410688522.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2014-11-26
Publication Date
2015-03-04
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The detection of pyraclostrobin residues in the environment and food has problems such as insufficient sensitivity and unenvironmental detection methods. Moreover, existing methods require the use of large amounts of organic solvents, which affects environmental safety.

Method used

Using molecularly imprinted polymer technology, based on pyraclostrobin as a template molecule, through specific binding and elution functions, molecularly imprinted polymers with specific adsorption are prepared for extraction and enrichment from complex environments and foods. Collect pyraclostrobin and combine it with chromatographic detection methods to improve detection sensitivity.

Benefits of technology

Significantly improves the sensitivity and efficiency of pyraclostrobin detection, reduces the use of organic solvents, and achieves highly selective extraction and purification of pyraclostrobin residues in the environment and food, which is safe, economical, and environmentally friendly .

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Abstract

The invention relates to a preparation method of a pyraclostrobin molecularly-imprinted polymer. The preparation method comprises the following steps of: mixing and dissolving template molecule pyraclostrobin, functional monomer MAA (Methacrylic Acid) and cross-linking agent EDMA (Ethylene Glycol Dimethacrylate) according to the mole ratio of the module molecule to the functional monomer to the cross-linking agent of 1 to 4 to 20 in pore-foaming agent acetonitrile; adding initiating agent azobisisobutyronitrile, and carrying out water bath reaction at 60-65 DEG C through nitrogen protection to obtain a template molecule polymer; after further vacuum drying and grinding, removing the module molecule through Soxhlet extraction, and carrying out vacuum drying at 60 DEG C to constant weight so as to finally obtain the pyraclostrobin molecularly-imprinted polymer. The pyraclostrobin molecularly-imprinted polymer prepared through the method disclosed by the invention is capable of effectively separating and gathering pyraclostrobin contained in a complex substrate and detecting a trace amount of pyraclostrobin contained in the environment and food by being combined with the traditional detection method (HPLC), thereby improving the detection efficiency and sensitivity of pyraclostrobin.
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