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Reference type: Journal
Authors: Chen CY, Wang CH, Chen AH
Article Title: Recognition of molecularly imprinted polymers for a quaternary alkaloid of berberine.
Publication date: 2011
Journal: Talanta
Volume: 84
Issue: (4)
Page numbers: 1038-1046.
DOI: 10.1016/j.talanta.2011.03.009
Alternative URL: http://www.sciencedirect.com/science/article/B6THP-52C8FRV-5/2/9f4c73e2f7fc3b5f3099190e7ffb961b

Abstract: Selective and affinitive imprinted polymers incorporating a quaternary alkaloid of berberine (BER) were prepared using a non-covalent imprinting method. The results showed that, compared to other imprinted polymers, the polymer AD-10 had not only a higher of the ratio of QMIP/QBP for BER adsorption, and but also a larger of the ratio of QMIP,B/QMIP,P for BER and palmatine (PAL) adsorptions. Spectrophotometric analysis demonstrated that a 1:1 cooperative hydrogen-bonding complex might be predominating in the pre-polymerization between the BER template and AA monomer. Adsorption experiments of BER on the polymer AD-10 were in accordance with the second-order and Langmuir adsorption models. The E value (5.70 kJ/mol) calculated from the Dubinin-Radushkevich model indicated that the adsorption followed a physisorption process. In addition, a Scatchard plot showed a single straight line with an equilibrium dissociation constant (KD) of 65.80 μmol/L. SPE analyses of a mixture of BER and PAL and the methanol extract from the cortices of Phellodendron wilsonii showed that AD-10 had more efficiency, and higher specificity and selectivity for SPE in the concentration and determination of BER and its extraction from natural products
Template and target information: berberine, BER
Author keywords: molecularly imprinted polymer, Quaternary alkaloid, molecular recognition, Adsorption equilibrium, Solid-phase extraction

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