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以三聚氰胺为模板分子,甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,以自制Fe_3O_4磁性纳米粒子为载体合成具有特异性识别三聚氰胺的磁性分子印迹聚合物微球。采用扫描电镜(SEM)扫描并分析聚合物微球的表面结构和颗粒大小。结果表明,三聚氰胺分子印迹聚合物与Fe_3O_4磁性纳米粒子成功偶联,结合高效液相色谱分析技术对该分子印迹聚合物的吸附性能及选择性进行分析,结果表明该分子印迹聚合物对三聚氰胺有特异性吸附,并建立了基于磁性分子印迹聚合物前处理技术的三聚氰胺高效液相色谱法,实现了磁性分子印迹技术在牛奶样品中三聚氰胺的检测。
Using melamine as the template molecule, methacrylic acid (MAA) as the functional monomer and ethylene glycol dimethacrylate (EGDMA) as the crosslinking agent, magnetic particles with specific recognition of melamine were synthesized from self-made Fe_3O_4 magnetic nanoparticles Imprinted polymer microspheres. Scanning electron microscopy (SEM) was used to scan and analyze the surface structure and particle size of polymer microspheres. The results showed that the melamine molecularly imprinted polymer was successfully coupled with Fe_3O_4 magnetic nanoparticles, and the adsorption performance and selectivity of the molecularly imprinted polymer were analyzed by high performance liquid chromatography. The results showed that the imprinted polymer was specific to melamine Adsorption, and established based on the magnetic molecularly imprinted polymer pretreatment technology of melamine high performance liquid chromatography to achieve a magnetic molecular imprinting technology in the detection of melamine in milk samples.