Abstract: Magnetic molecularly imprinted polymer microspheres (MMIPs) were prepared with Camphor as a template molecule, P (St-co-MAA) as a functional monomer and Fe3O4 magnetic fluid as a magnetic component, as well as nonimprinted polymers (MNIPs) without addition of any template molecules. The morphologies, sizes and polymeric properties of MMIPs were characterized by X-ray diffraction, scanning electron microscope and Fourier transform infrared spectroscopy. The binding affinity and selectivity to Camphor of MMIPs and MNIPs were evaluated by equilibrium adsorption experiments and their adsorption kinetics was studied. MMIPs exhibited good adsorption affinity and selectivity toward Camphor. Scatchard analysis further showed two different adsorption sites existing in MMIPs. The Camphor in the essential oil of Lavandula angustifolia was enriched and determined by gas chromatography. The recoveries were in the range of 67.0% ~ 75.8% with low RSD (4.5%) and the limit of detection for Camphor was 3.16 μg/mL. The assay provided a new way for the separation and enrichment of Camphor in the essential oil of Lavandula angustifolia for further improvement of the essential oil quality.
Template and target information: camphor
Author keywords: Camphor, Magnetic molecularly imprinted polymer microspheres, The essential oil of Lavandula angustifolia, Absorption characteristic