Method for preparing high molecular polymer enriched with trace ractopamine

A high-molecular polymer and ractopamine technology, which is applied in the field of high-molecular materials and analytical chemistry, can solve problems such as difficult to completely remove matrix interference, and achieve the effect of economical and practical synthesis process, easy control of reaction conditions, and high selectivity

Inactive Publication Date: 2010-06-23
TIANJIN UNIV OF SCI & TECH
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Problems solved by technology

However, the interaction between the target substance and the adsorbent in traditional solid-phase extraction is non-specific. It usually requires careful selection of extraction and elution conditions, and sometimes it is difficult to completely remove the interference of the matrix.

Method used

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Embodiment Construction

[0011] Below in conjunction with embodiment, the present invention is further described; Following embodiment is illustrative, not limiting, can not limit protection scope of the present invention with following embodiment.

[0012] The present invention combines surface molecular imprinting technology with sol-gel technology, and imprints amino functional groups on the surface of silicon spheres, thereby synthesizing a functional material with high selective adsorption to ractopamine. The specific examples are:

[0013] (1) Accurately weigh 0.5g of ractopamine and dissolve it in 3mL of methanol, add 1.7mL of 3-aminopropyltriethoxysilane and 0.1g of activated silicon spheres, stir the reaction in a 25mL round bottom flask for 50min, add 1.65mL Tetraethoxysilane, stirred for 20 minutes, added 0.5 mL of 0.1mol / L acetic acid, stirred for 10 minutes with magnetic force, and incubated at 40°C for 15 hours;

[0014] (2) After the above-mentioned polymerization product is washed and ...

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Abstract

The invention relates to a method for preparing a molecularly imprinted polymer enriched with trace ractopamine. In the method, methanol is used as a solvent, 3-aminopropyl triethoxysilane is used as a functional monomer, tetraethoxy silane is used as a crosslinking agent, an activated silicon ball is used as a carrier, and a surface molecular imprinting technique and a sol-gel technique are utilized to synthesize an adsorptive functional material having high selectivity to the ractopamine. The method has the advantages of simple synthesis method and high adsorption specificity to objects. The functional material prepared by the method can be used for performing quick pretreatment on samples and performing online detection on the ractopamine.

Description

technical field [0001] The invention belongs to the field of polymer materials and analytical chemistry, and in particular relates to a preparation method of a polymer enriched with trace amounts of ractopamine in food. technical background [0002] Ractopamine (RAC for short) is a new type of feed additive successfully developed by ELILILY Company of the United States, which can significantly increase carcass lean meat percentage and improve feed conversion rate. When the cumulative intake dose in the human body exceeds a certain value, toxic and side effects are prone to occur, so ractopamine is prohibited from being used in feed processing or feeding in most countries such as the European Union. At present, the detection methods of RAC mainly include enzyme-linked immunoassay (ELISA) and chromatography. ELISA analysis method sample pretreatment is simple, but it is prone to false positive results; chromatography usually needs enrichment when detecting trace and ultra-tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08J9/26B01J20/26B01J20/30C07C215/54C07C213/10
Inventor 王硕刘莉王俊平方国臻
Owner TIANJIN UNIV OF SCI & TECH
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