Surface molecularly imprinted polymers for solid-phase extraction of (--epigallocatechin gallate from toothpaste

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• 作者：Yunling Gao ; Ying Hu ; Kejian Yao
• 关键词：β ; cyclodextrin ; (- ; epigallocatechin gallate ; surface molecular imprinting ; solid ; phase extraction
• 刊名：Frontiers of Chemical Science and Engineering
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：9
• 期：4
• 页码：467-478
• 全文大小：1,611 KB
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• 作者单位：Yunling Gao (1)
  Ying Hu (1)
  Kejian Yao (1)
  
  1. State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Chinese Library of Science
  Industrial Chemistry and Chemical Engineering
  
• 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
• ISSN：2095-0187

文摘

Surface molecularly imprinted polymers (SMIPs) have been synthesized to selectively determine (--epigallocatechin gallate in aqueous media. SMIPs were prepared using a surface grafting copolymerization method on a functionalized silica gel modified with β-cyclodextrin and vinyl groups. The morphology and composition of the SMIPs were investigated by scanning electron microscopy, Fourier transform-infrared spectroscopy and thermogravimetric analysis. In addition, the molecular binding capacity, recognition properties and selectivity of the SMIPs were evaluated. The imprinted polymers were found to have a highly specific recognition and binding capacity for (--epigallocatechin gallate in aqueous media which is the result of the hydrophobic properties of the β-cyclodextrin and the hydrogen-bonding interactions of methacrylic acid. The SMIPs were successfully employed as solid-phase extraction adsorbents prior to the HPLC determination of (--epigallocatechin gallate in toothpaste. The HPLC analysis had a linear dynamic range of 0.5-0.0 μg·mL? with a correlation coefficient of 0.9998 and the recoveries ranged from 89.4% to 97.0% with relative standard deviations less than 4.8%. The limit of detection and limit of quantification were 0.17 and 0.33 μg·mL?, respectively. The method provides a promising approach for the preparation of selective materials for the purification and determination of complex samples.