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Reference type: Journal
Authors: Hu CH, Deng J, Zhao YB, Xia LS, Huang KH, Ju SQ, Xiao N
Article Title: A novel core-shell magnetic nano-sorbent with surface molecularly imprinted polymer coating for the selective solid phase extraction of dimetridazole.
Publication date: 2014
Journal: Food Chemistry
Volume: 158
Page numbers: 366-373.
DOI: 10.1016/j.foodchem.2014.02.143
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0308814614003288

Abstract: A novel core-shell magnetic nano-sorbent with surface molecularly-imprinted polymer coating was prepared via a sol-gel process. Methyltrimethoxysilane and 3-aminopropyltriethoxysilane were used as functional monomers, tetraethyl orthosilicate as cross-linker, and Al3+ as dopant to generate Lewis acid sites in the silica matrix for the metal coordinate interactions with the template dimetridazole (DMZ). The ratios of the monomers, the dopant, and the cross-linker, were optimised by a OA9 (34) orthogonal array design. The resultant sorbent was characterised by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, and magnetometry. The binding performances of the sorbent were evaluated by static, kinetic and selective adsorption experiments. The nano-sorbent was successfully applied to solid phase extraction followed by spectrophotometric determination of DMZ in real samples. Spiked recoveries ranged from 90.33% to 106.20% for egg, milk powder, and pig feed samples, with relative standard deviations of less than 4.54%
Template and target information: dimetridazole, DMZ
Author keywords: surface molecularly imprinted polymer, sol-gel process, Dimetridazole, Magnetic nano-sorbent

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