Journal
FOOD CHEMISTRY
Volume 200, Issue -, Pages 215-222Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.01.004
Keywords
Magnetic separation; Branched polyethyleneimine; Solid-phase extraction; Hydrophilicity; Chlorogenic acid
Funding
- National Natural Science Foundation of China [21305107]
- Fundamental Research Funds for the Central Universities [xjj2013041, 08142034]
- China Postdoctoral Science Foundation [2014M562388]
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In this paper, the novel hydrophilic magnetic molecularly imprinted nanoparticles were developed for selective separation and determination of chlorogenic acid in aqueous fruit juices. The polymers were prepared by using amino-functionalized magnetic nanoparticles as carriers, branched polyethyleneimine as functional monomer, and chlorogenic acid as template molecule. Branched polyethyleneimine with abundant active amino groups could react with template sufficiently, and its unique dendritic structure may amplify the number of the imprinted cavities. Meanwhile, it would improve the hydrophilicity of imprinted materials for attaining high extraction efficiency. The resulted polymers exhibit fast kinetics, high adsorption capacity, and favorable selectivity. In addition, the obtained nanoparticles were used as solid-phase extraction sorbents for selective isolation and determination of chlorogenic acid in peach, apple, and grape juices (0.92, 4.21, and 0.75 mu g mL (1), respectively). (C) 2016 Elsevier Ltd. All rights reserved.
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