The specific of magnetic molecularly imprinted polymers (Fe₃O₄@SiO₂-MIPs) for kaempferol were fabricated by using acrylamide (AM) as the functional monomer, azobisisobutyronitrile (AIBN) as the initiator and ethylene glycol dimethacrylate (EGDMA) as the cross-linker. The Fe₃O₄@SiO₂-MIPs showed high adsorption capacity (3.84 mg/g) for kaempferol, and the adsorption equilibrium was achieved within 50 min. The specific recognition capacity of Fe₃O₄@SiO₂-MIPs was 3.02 times as high as that of Fe₃O₄@SiO₂-NIPs. The Fe₃O₄@SiO₂-MIPs showed high selectivity towards kaempferol over structural analogues. The recoveries of proposed method at three spiked levels analysis were ranged from 90.5% to 95.4% with the relative standard deviations (RSD) less than 5%. The obtained Fe₃O₄@SiO₂-MIPs were successfully applied for the extraction and determination of kaempferol from apple samples. The established method was simple and feasible, which showed high selectivity, fast separation and satisfactory recoveries for real sample analysis.

以丙烯酰胺(AM)为功能单体、偶氮二异丁腈(AIBN)为引发剂、乙二醇二甲基丙烯酸酯(EGDMA)为交联剂制备了山奈酚磁性分子印迹聚合物(Fe ₃ O ₄ @SiO ₂ -MIPs)。 -链接器。 Fe ₃ O ₄ @SiO ₂ -MIPs对山奈酚表现出较高的吸附容量(3.84 mg/g)，并且在50 min内达到吸附平衡。 Fe ₃ O ₄ @SiO ₂ -MIPs的比识别能力是Fe ₃ O ₄ @SiO ₂ -NIPs的3.02倍。 Fe ₃ O ₄ @SiO ₂ -MIPs 对山奈酚的选择性高于结构类似物。所提出的方法在三个加标水平分析的回​​收率范围为90.5%至95.4%，相对标准偏差(RSD)小于5%。所得Fe ₃ O ₄ @SiO ₂ -MIPs成功应用于苹果样品中山奈酚的提取和测定。所建立的方法简单可行，对实际样品分析表现出选择性高、分离速度快、回收率满意的特点。