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Reference type: Journal
Authors: Fan DX, Jia L, Xiang HY, Peng MJ, Li H, Shi SY
Article Title: Synthesis and characterization of hollow porous molecular imprinted polymers for the selective extraction and determination of caffeic acid in fruit samples.
Publication date: 2017
Journal: Food Chemistry
Volume: 224
Page numbers: 32-36.
DOI: 10.1016/j.foodchem.2016.12.042
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0308814616320507

Abstract: Hollow porous molecular imprinted polymers (HPMIPs) were prepared using caffeic acid (CA) as template, 4-vinylpyridine (4-VP) as functional monomer, and MCM-48 as sacrificial support. Large surface area (562.7 m2/g) of HPMIPs resulted in high binding capacity (27.26 mg/g) and fast kinetic binding (40 min) in comparison with solid MIPs. Equilibrium data fitted well to Freundlich equation, and adsorption process with multi-diffusion mechanisms could be described by pseudo-second order model. Selectivity of HPMIPs was favorable. Finally, HPMIPs were successfully used to rapidly and selectively extract CA from fruits with a relatively satisfactory recovery (87.1-101.3%). Coupling with HPLC, contents of CA in kiwifruit, apple, papaya and waxberry were less than 1.0 μg/g fresh fruit. Results indicated the superiority of HPMIPs in the separation field
Template and target information: caffeic acid, CA
Author keywords: Molecularly imprinted polymers, Kinetic models, selective extraction, caffeic acid, food analysis


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