Journal
JOURNAL OF SEPARATION SCIENCE
Volume 35, Issue 8, Pages 1036-1043Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201101016
Keywords
Bisphenol A; Dummy molecularly imprinted polymer; HPLC; Milk; Stir bar sorptive extraction
Categories
Funding
- National Natural Science Foundation of China [20777038, 81171937]
- scientific innovation research for college graduate of Jiangsu province [JX22013128]
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A water compatible molecularly imprinted polymers (MIPs) coated stir bar for bisphenol A(BPA) was prepared with 3,3',5,5'-tetrabromobisphenol A as the dummy template molecule in this study. The dummy molecularly imprinted polymers coated stir bar (DMIPs-SB) showed better selectivity than the bars coated with polydimethylsiloxane or non-imprinted polymers when used to extract BPA and its three analogues. The saturated adsorption amount of the DMIPs coating was 3.0 times over that of the non-imprinted polymers coating. To achieve the optimum extraction performance, several parameters, including extraction and desorption time, pH value, adsorption temperature and stirring speed were investigated. The high-performance liquid chromatography combined with the DMIPs-SB was employed in the analysis of BPA in aqueous solution. The linear range of BPA concentration in aqueous medium was 0.02282.28 ng/mL with correlation coefficient of 0.9994 and the detection limit was about 6.84 x 10-3 ng/mL based on three times ratio of signal to noise. This method was directly applied to the determination of trace BPA in milk with satisfactory results.
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