Journal
JOURNAL OF SEPARATION SCIENCE
Volume 35, Issue 5-6, Pages 707-712Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201100883
Keywords
Bisphenol A; Dummy molecularly imprinted polymers; Sol-gel; Stir bar sorptive extraction
Categories
Funding
- National Natural Science Foundation of China [20777038, 81171937]
- Scientific Innovation Research for College Graduate of Jiangsu Province [JX22013128]
- Science and Technology Development Foundation of Nanjing Medical University [09 NJMU Z17]
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A unique stir bar coated with dummy molecularly imprinted polymers for bisphenol A was prepared by sol-gel technique. The scanning electron microscopic image of the coating presented a homogeneous surface with a thickness of about 57 +/- 2.5 mu m. The Fourier transform infrared spectrum of the coating proved the incorporating of dummy molecularly imprinted polymers with the sol-gel network. When used to extract bisphenol A from aqueous solution containing bisphenol A and its three analogs (4-tert-butylphenol, 4,4'-dihydroxybiphenyl, and 3,3',5,5'-tetrabromo-bisphenol A). Dummy molecularly imprinted polymers-coated stir bar showed better selectivity than the bars coated with polydimethylsiloxane or non-imprinted polymers. The extraction conditions including stirring speed, pH, and extraction time were optimized. After back extraction with methanol, the extracts were analyzed by high-performance liquid chromatography-fluorescence detection. The linear range was 0.02280.456 ng/mL with correlation coefficient of 0.9994 and the detection limit was about 5.70 x 10(-3) ng/mL based on three times ratio of signal-to-noise. The method was applied to the determination of trace bisphenol A in tap water.
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