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以樟脑为模板,Fe3O4为磁性粒子,P(St-co-MAA)为功能单体,制备了对樟脑具有特异选择性的磁性分子印迹聚合物微球(MMIPs)及不加模板的磁性非印迹聚合物(MNIPs)。利用X-射线粉末衍射仪、扫描电镜及傅里叶红外光谱仪对樟脑MMIPs的形态及组成进行表征;采用静态平衡吸附评价MMIPs及MNIPs对模板分子的结合性能,并进行动力学研究。结果显示MMIPs对樟脑表现出较好的特异性吸附,Scatchard分析显示MMIPs对樟脑存在两种不同类型的吸附位点。结合樟脑MMIPs和气相色谱技术,对薰衣草精油中樟脑进行富集分离和检测,在所研究浓度范围内,其回收率在67.0%~75.8%之间,RSD<4.5%,方法检出限为3.16μg/m L,实现了薰衣草精油中有害成分樟脑的快速分离与富集。
The magnetic molecularly imprinted polymer microspheres (MMIPs) with specific selectivity to camphor and the non-template magnetic imprinting were prepared with camphor as template, Fe3O4 as magnetic particle and P (St-co-MAA) as functional monomer Polymers (MNIPs). The morphology and composition of camphor MMIPs were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The static equilibrium adsorption was used to evaluate the binding properties of MMIPs and MNIPs to the template molecules. The results showed that MMIPs showed good specific adsorption to camphor, Scatchard analysis showed that there are two different types of adsorption sites for camphor in MMIPs. Combined with camphor MMIPs and gas chromatography, the camphor in lavender essential oil was separated and tested. The recoveries ranged from 67.0% to 75.8% with a RSD <4.5% and the detection limit was 3.16 μg / m L, which realized the rapid separation and enrichment of the camphor in the essential oil of lavender.