Selective extraction of sulfonamides from food by use of silica-coated molecularly imprinted polymer nanospheres

Analytical and Bioanalytical Chemistry
Ruixia GaoYukui Zhang

Abstract

We report the use of nanospheres prepared by coating silica with molecularly imprinted polymer (MIP) for sulfamethoxazole (SMO). The resulting SiO(2)-SMO-MIP nanoparticles have highly improved imprinting and adsorption capacity, and can be used for separation and determination of sulfonamides in eggs and milk. In the synthesis, monodispersed SiO(2) nanoparticles (Si-NP) of diameter 80 nm were amino-modified by reaction with 3-aminopropyltriethoxylsilane. The acryloyl monolayer was then grafted onto the amine-modified Si-NP. Finally, the MIP films were coated on to the surface of Si-NP by the copolymerization of the vinyl end groups with functional monomer (acrylamide), cross-linking agent (ethylene glycol dimethacrylate), initiator (azo-bis-isobutyronitrile), and template molecule (sulfamethoxazole). The resulting SiO(2)-SMO-MIP-NP were characterized by transmission electron microscopy, scanning electron microscopy, and Fourier transform infrared spectrometry. The adsorption properties were demonstrated by equilibrium rebinding experiments and Scatchard analysis. The results showed that the binding sites of the SiO(2)-SMO-MIP were highly accessible, and the maximum adsorption capacity of the SiO(2)-SMO-MIP for SMO was 20.21 mg ...Continue Reading

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Citations

Sep 17, 2013·Analytical and Bioanalytical Chemistry·Lijun XieGangfeng Ouyang
Aug 9, 2015·Photodiagnosis and Photodynamic Therapy·Leila Hossein RashidiWei Chen
Apr 5, 2014·Journal of Molecular Recognition : JMR·Michael J WhitcombeIan A Nicholls
Feb 3, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Dimitrios Bitas, Victoria Samanidou
Mar 5, 2016·Chemical Society Reviews·Lingxin ChenJinhua Li
Aug 17, 2018·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Mahdieh Sadat MohsenzadehSeyed Ahmad Mohajeri
Apr 17, 2019·Analytical and Bioanalytical Chemistry·Zhao Bin LiJian Ping Wang

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