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Preparation method of metal organic framework molecularly imprinted polymer used for enriching trace amounts of Metolcarb

A metal-organic framework and molecular imprinting technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as expensive equipment and difficult detection, and achieve fast mass transfer, long service life, and easy control of reaction conditions Effect

Active Publication Date: 2013-01-30
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

However, when trace amounts of Methiocarb exist in food, the above detection methods are difficult to detect or the equipment is expensive
The method of using solid phase extraction is faster and more accurate than traditional solvent extraction, but it needs to use solid phase adsorption materials with high selectivity for methiocarb

Method used

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Examples

Experimental program
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specific Embodiment

[0012] (1) Add 0.020g metal-organic framework material (MOF-5) and 4mL acetonitrile into a 25mL round-bottomed flask with a stopper, add 0.165g (1.0mmol) amecarb template and stir to dissolve completely, then add 0.340mL (4.0mmol) methacrylic acid (MAA), stir well for 1h; add 0.500mL (2.2mmol) crosslinking agent tetraethoxysilane (TEOS) and 0.170mL acetic acid (2.06mol L -1 ) to react for 0.5h; pass nitrogen gas for 10min, and then thermally polymerize in a water bath at 60°C for 20h;

[0013] (2) The above-mentioned polymer was pulverized, placed in a Soxhlet extractor, 270 mL of methanol and 30 mL of glacial acetic acid were added as extraction solvents, and the extraction was continued for 48 hours until no amecarb was detected in the extract. Vacuum-dry at 60°C for 10 hours to obtain the molecularly imprinted polymer of amecarb.

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Abstract

The invention relates to a preparation method of a metal organic framework molecularly imprinted polymer used for enriching trace amounts of Metolcarb. A main technical point of the invention is that: a metal organic framework is adopted as a supporting body, Metolcarb is adopted as a template molecule, methacrylic acid is adopted as a functional monomer, tetraethoxy silane is adopted as a cross-linking agent, and acetonitrile is adopted as a solvent; and an absorption functional material with high selectivity upon Metolcarb is synthesized with an embedding method. The method provided by the invention has the advantages of low cost, simple synthesizing process, and easy-to-control reaction conditions. The prepared Metolcarb molecularly imprinted polymer can be used in the combination of solid-phase extraction concentration and high-performance liquid chromatography, and can be used in separation and enrichment of trace amounts of Metolcarb in various foodstuff samples.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing a molecularly imprinted polymer enriched with trace amounts of metolcarb. Background technique [0002] As a typical carbamate pesticide, Methiocarb has a large output, a wide variety, and a wide range of dosages. It is easily degraded into corresponding metabolites in organisms and the environment. These metabolites usually have the same or stronger activity as the parent compound. The toxic effect is the inhibition of acetylcholinesterase, and the poisoning symptoms are similar to organophosphorus pesticides. With the continuous increase of its dosage in recent years, its harm to humans and other organisms is becoming more and more serious, and its analysis and detection are also paid more and more attention by people. With the accession of WTO, the problem of dining table and green food has attracted people's attention, and the detection of pe...

Claims

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Application Information

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IPC IPC(8): C08F120/06C08J3/24C08J9/26B01J20/285B01J20/30
Inventor 王硕方国臻钱坤王俊平
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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