Issue 16, 2014

Synthesis and characterization of molecularly imprinted polymers with modified rosin as a cross-linker and selective SPE-HPLC detection of basic orange II in foods

Abstract

Basic orange II (BOII) is an alkaline azo dye that is listed as a prohibited substance in food additives. In order to develop a novel molecularly imprinted polymer (MIP) with modified rosin as a cross-linker for the selective solid-phase extraction (SPE) of BOII in foods, MIP was synthesized using BOII as the template molecule, acrylamide as the functional monomer, and maleic rosin glycol acrylate (MRGA) as the cross-linking agent. MIP was characterized using scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis. Compared to the imprinted polymers prepared by the traditional cross-linker, MIP showed a highly imprinting capacity, significant selectivity, hardness and toughness, and it could be used as a SPE material, as well as for the detection of illegal addition of BOII in food. In the sample with a spiked level of 5–11 mg kg−1, BOII in foods revealed an average recovery rate of 68.43–80.25% with a precision (relative standard deviation) of less than 1.2%.

Graphical abstract: Synthesis and characterization of molecularly imprinted polymers with modified rosin as a cross-linker and selective SPE-HPLC detection of basic orange II in foods

Article information

Article type
Paper
Submitted
03 Apr 2014
Accepted
09 Jun 2014
First published
09 Jun 2014

Anal. Methods, 2014,6, 6397-6406

Author version available

Synthesis and characterization of molecularly imprinted polymers with modified rosin as a cross-linker and selective SPE-HPLC detection of basic orange II in foods

X. Li, M. Li, J. Li, F. Lei, X. Su, M. Liu, P. Li and X. Tan, Anal. Methods, 2014, 6, 6397 DOI: 10.1039/C4AY00810C

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