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Reference type: Journal
Authors: Ma RT, Shi YP
Article Title: Magnetic molecularly imprinted polymer for the selective extraction of quercetagetin from Calendula officinalis extract.
Publication date: 2015
Journal: Talanta
Volume: 134
Page numbers: 650-656.
DOI: 10.1016/j.talanta.2014.12.003
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0039914014009849

Abstract: A new magnetic molecularly imprinted polymers (MMIPs) for quercetagetin was prepared by surface molecular imprinting method using super paramagnetic core-shell nanoparticle as the supporter. Acrylamide as the functional monomer, ethyleneglycol dimethacrylate as the crosslinker and acetonitrile as the porogen were applied in the preparation process. Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD) and Vibrating sample magnetometer (VSM) were applied to characterize the MMIPs, and High performance liquid chromatography (HPLC) was utilized to analyze the target analytes. The selectivity of quercetagetin MMIPs was evaluated according to their recognition to template and its analogues. Excellent binding for quercetagetin was observed in MMIPs adsorption experiment, and the adsorption isotherm models analysis showed that the homogeneous binding sites were distributed on the surface of the MMIPs. The MMIPs were employed as adsorbents in solid phase extraction for the determination of quercetagetin in Calendula officinalis extracts. Furthermore, this method is fast, simple and could fulfill the determination and extraction of quercetagetin from herbal extract
Template and target information: quercetagetin
Author keywords: Magnetic molecularly imprinted polymers, Surface imprinting method, Quercetagetin, solid phase extraction, Traditional Chinese medicine

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