Journal
ANALYTICAL METHODS
Volume 6, Issue 16, Pages 6397-6406Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ay00810c
Keywords
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Funding
- National Natural Science Foundation of China [21165003, 31360162, 21365004]
- Guangxi Natural Science Foundation [2010GXNSFA013047, 2013GXNSFDA019006]
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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 simple 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%.
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