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Reference type: Journal
Authors: Li ZY, Quan HJ, Gong CB, Yang YZ, Tang Q, Wei YB, Ma XB, Lam HW
Article Title: Photocontrolled solid-phase extraction of guanine from complex samples using a novel photoresponsive molecularly imprinted polymer.
Publication date: 2015
Journal: Food Chemistry
Volume: 172
Page numbers: 56-62.
DOI: 10.1016/j.foodchem.2014.09.027
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0308814614013946

Abstract: A novel photoresponsive molecularly imprinted polymer (MIP) was developed for the selective extraction of guanine from complex samples. The photoresponsive MIP was fabricated using guanine as the template, water-soluble 5-[(4-(methacryloyloxy)phenyl)diazenyl]isophthalic acid as the functional monomer, and water-soluble triethanolamine trimethacrylate as the cross-linker. The MIP displayed good selectivity toward guanine with a dissociation constant of (2.70 0.16) x 10-5 mol L-1 in aqueous media. The density of the guanine-specific receptor sites in the MIP material was (4.49 0.22) μmol g-1. Quantitatively release and uptake of guanine by the MIP occured with irradiation at 365 and 440 nm, respectively. The MIP could efficiently extract guanine from beer and then release it into aqueous media under photocontrol. This method could be used for selective separation and subsequent determination of a specific analytes from complex samples
Template and target information: guanine
Author keywords: Guanine, Photoresponsive molecularly imprinted polymer, Solid-phase extraction, beer, adenine, uric acid

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