NDLI: Fast clean-up and selective enrichment of florfenicol in milk by restricted access media molecularly imprinted magnetic microspheres based on surface-initiated photoiniferter-mediated polymerization

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Fast clean-up and selective enrichment of florfenicol in milk by restricted access media molecularly imprinted magnetic microspheres based on surface-initiated photoiniferter-mediated polymerization

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Analytical Methods Vol - 8 Issue - 9

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Fast clean-up and selective enrichment of florfenicol in milk by restricted access media molecularly imprinted magnetic microspheres based on surface-initiated photoiniferter-mediated polymerization

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Jing Li, Meng-Zhe Zhou, Shao-Dan Ren, Xing-Hui Lv, Yun-Kai Wang, Jing
Copyright Year	2016
Abstract	A novel restricted-access media molecularly imprinted magnetic microsphere (RAM-MIMM) was prepared by an initiator-transfer agent-terminator (iniferter) method. The iniferter was synthesized by coating magnetic nanoparticles with silica-gel, modifying them with an amino-group and reacting with 4-(chloromethyl)benzoyl chloride and sodium diethyldithiocarbamate. The molecularly imprinted magnetic microsphere (MIMM) was prepared using florfenicol (FF) as the template, itaconic acid (ITA) as the functional monomer, ethylene dimethacrylate (EDMA) as the cross-linker, and the iniferter as the surface initiator in anhydrous ethanol solvent. The hydrophilic external layer of the MIMM was formed by iniferter polymerization using glycidyl methacrylate (GMA) as monomer, followed by hydrolysis of the linear poly(GMA). The obtained RAM-MIMMs were characterized by TEM, TGA, FT-IR and adsorption experiments. The Fe3O4 magnetic microspheres were demonstrated to have average diameters around 230 nm and coating thicknesses in the range 20–30 nm. The RAM-MIMMs exhibited high selectivity (1.68) with respect to the imprinted cavities and a hydrophilic external surface with water compatibility and exclusion biomacromolecules. The RAM-MIMMs were used for magnetic dispersion extraction of FF from milk samples. Average recoveries were in the range 85.4–94.7% with a precision of 2.95–4.97%. The limits of detection and quantitation of the proposed method were in the ranges 4.40–18.31 μg kg−1 and 14.66–61.02 μg kg−1, respectively. The proposed method was successfully applied to fast clean-up and selective enrichment of florfenicol in milk.
Starting Page	3982
Ending Page	3989
Page Count	8
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	8
Issue Number	19
Journal	Analytical Methods
DOI	10.1039/c6ay00417b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ethanol Ethylene Benzoyl group Polymerization Biomacromolecules Independent Television Authority Fourier-transform infrared spectroscopy Sodium diethyldithiocarbamate Hydrolysis EDMA Chloride Transmission electron microscopy Adsorption Carboxylic acid Florfenicol Microparticle Glycidyl methacrylate Hydrophile Monomer Solvent Institution of Mining and Metallurgy
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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