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将Fe3O4@Si-C8/C18复合磁性纳米材料应用于食品安全中的兽药净化领域,采用共沉淀法制备磁性纳米前躯体,并在乙醇相中进行表面硅化处理及(辛基三甲氧基硅烷)C8/(十八烷基三甲氧基硅烷)C18表面修饰,经透射电镜、X射线、磁性能分析、红外光谱等手段对所制备的复合磁性纳米进行表征,所制备的磁性纳米大小均匀,粒径在100～1000nm范围内可调,经多重修饰后的Fe3O4@Si-C8/C18复合磁性纳米材料其磁性强度没有明显降低,并具有表面富集功能。为考察这种磁性纳米材料在兽药提取中的应用,选取豆芽中氯霉素残留的净化来进行初步研究,结果表明所制备的复合型磁性纳米材料在小分子净化富集中展现出广阔的应用价值,尤其在食品安全领域。
Fe3O4 @ Si-C8 / C18 composite magnetic nanomaterials used in food safety in the field of veterinary cleaning, the use of coprecipitation method for the preparation of magnetic nano-precursor, and in the ethanol phase surface silicidation and (octyl trimethoxysilane) C8 / (octadecyltrimethoxysilane) C18 surface modification, by the means of transmission electron microscopy, X-ray, magnetic properties analysis, infrared spectroscopy and other means of the composite magnetic nano-prepared by the performance of the prepared magnetic nano-size uniform, particle Diameter in the range of 100 ~ 1000nm adjustable, the multi-modified Fe3O4 @ Si-C8 / C18 composite magnetic nano-materials did not significantly reduce the magnetic strength, and has surface enrichment. In order to investigate the application of magnetic nanomaterials in the veterinary drug extraction, the preliminary study on the purification of chloramphenicol residues in bean sprouts was carried out. The results showed that the prepared composite magnetic nanomaterials showed broad application value in the purification and enrichment of small molecules , Especially in the area of food safety.