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为了研究表面分子印迹聚合物对基质复杂的环境样品中的土霉素的吸附分离效果,以应用最为广泛的土霉素(OTC)为研究对象,利用甲基丙烯酸和甲基丙烯酸甲酯为双功能单体、在二氧化硅基质上制备了表面分子印迹聚合物,并对其吸附鸡粪中的四环素类抗生素进行了研究。以聚合物的吸附容量和印迹因子为考核指标,对两种单体的投加比例和二氧化硅的用量进行了优化,确定其合成最佳条件:二氧化硅用量为15 mmol、单体总量一定时各物质的摩尔比为OTC∶MAA∶MMA∶EGDMA=0.08∶2.0∶2.0∶8.0。在此条件下合成的表面印迹聚合物对鸡粪基质中的OTC的最大吸附量可达到9.67 mg/g,印迹因子4.69,可见该表面印迹聚合物对复杂环境样品中的OTC也有良好的吸附性能和识别性能。
In order to study the effect of surface molecularly imprinted polymers on the adsorption and separation of oxytetracycline in the complex environment samples, the most widely used oxytetracycline (OTC) was selected as the research object. With the use of methacrylic acid and methyl methacrylate as bis Functional monomer, a surface molecularly imprinted polymer was prepared on a silica substrate, and the adsorption of tetracycline antibiotics in chicken manure was studied. The adsorption capacity of polymer and imprinting factor as evaluation index, the dosage of two monomers and the amount of silica were optimized to determine the optimal synthesis conditions: the amount of silica 15 mmol, the total monomer The amount of certain substances when the molar ratio of OTC: MAA: MMA: EGDMA = 0.08: 2.0: 2.0: 8.0. Under these conditions, the maximum adsorption capacity of surface-imprinted polymer on chicken feces matrix was 9.67 mg / g and the imprinting factor was 4.69. It can be seen that the surface-imprinted polymer also has good adsorption properties for OTC in complex environmental samples And identify performance.