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Reference type: Journal
Authors: Wu CJ, He J, Li YY, Chen NN, Huang ZP, You LQ, He LJ, Zhang SS
Article Title: Solid-phase extraction of aflatoxins using a nanosorbent consisting of a magnetized nanoporous carbon core coated with a molecularly imprinted polymer.
Publication date: 2018
Journal: Microchimica Acta
Volume: 185
Issue: (11)
Page numbers: ArticleNo515.
DOI: 10.1007/s00604-018-3051-8

Abstract: A core consisting of nanoporous carbon (MNPC) and magnetized with Co3O4 was coated with a molecularly imprinted polymer (MIP) by atom transfer radical precipitation polymerization. Ethyl 3-coumarincarboxylate was used as a pseudo-template to give a MIP that has a fairly specific recognition capability for aflatoxins. Batch rebinding studies were carried out to determine the specific adsorption equilibrium and specific recognition. Extraction is achieved in a single step by mixing and vortexing the sample extract with the Co-MNPC@MIP. The loaded nanosorbent was then magnetically separated and eluted with acetonitrile/water (6/4, v/v). The aflatoxins were then quantified by HPLC. Under optimal conditions, the detection limits for aflatoxins typically are 0.05-0.07 ng mL-1, recoveries from spiked corn are found to be 75.1 to 99.4%, and relative standard deviations range from 1.7 to 5.1 (n = 6)
Template and target information: ethyl 3-coumarincarboxylate, pseudo-template, dummy template, aflatoxin
Author keywords: pseudo-template, Atom transfer radical precipitation polymerization, surface imprinting, Core-shell, Metal-organic frameworks, Zeolitic imidazolate framework-L, carbonization, pretreatment, Magnetic sold phase extraction, Corn sample


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