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Preparative separation and determination of matrine from the Chinese medicinal plant Sophora flavescens Ait by molecularly imprinted solid-phase extraction

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Abstract

Molecularly imprinted microspheres (MIMs) were synthesized by micro-suspension polymerization using matrine (MT) as template. The MIMs were employed for solid-phase extraction (SPE) and as chromatographic stationary phase for the determination of MT from the Chinese medicinal plant Sophora flavescens. The effects of the various eluents, their concentrations and volumes on the retention behavior were investigated. The selectivity and capacity of the imprinted microspheres against MT was also discussed. The results showed that the MIMs exhibited stronger specific affinity to MT than to oxymatrine (OMT). Methanol–water (3:7, v/v) was used for washing impurities from the MIMs-SPE cartridge loaded with the herb extracts, while methanol–glacial acetic acid (9:1, v/v) was used for eluting MT. The maximum load of MT and the recovery of MIMs cartridge towards MT were 38.7 μg g–1 and 71.4%, respectively. The method developed might be used to separate and extract effective constituents from Chinese medicinal plants on a large scale.

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Acknowledgements

This research was supported by the CRCG (The University of Hong Kong Committee on Research and Conference Grants), RGC (the Hong Kong Research Grants Council) and the National Natural Science Foundation of China (No.29775014, No. 20175009).

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Authors and Affiliations

  1. Department of Botany, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China

    Jia-Ping Lai & Feng Chen

  2. Department of Chemistry, Nankai University, Tianjin 300071, P.R. China

    Jia-Ping Lai & Xi-Wen He

  3. Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P.R. China

    Yue Jiang

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  1. Jia-Ping Lai
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  2. Xi-Wen He
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  3. Yue Jiang
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  4. Feng Chen
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Correspondence to Feng Chen.

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Lai, JP., He, XW., Jiang, Y. et al. Preparative separation and determination of matrine from the Chinese medicinal plant Sophora flavescens Ait by molecularly imprinted solid-phase extraction. Anal Bioanal Chem 375, 264–269 (2003). https://doi.org/10.1007/s00216-002-1675-2

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  • DOI: https://doi.org/10.1007/s00216-002-1675-2

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