title: Dummy molecularly imprinted polymers as the coating of stir bar for sorptive extraction of bisphenol A in tap water.
abstract: 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 μm. 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 0.0228-0.456 ng/mL with correlation coefficient of 0.9994 and the detection limit was about 5.70 × 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.
authors.affiliation: School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, PR China.
authors.forename: Na
authors.initials: N
authors.lastname: Sheng
authors.forename: Fangdi
authors.initials: F
authors.lastname: Wei
authors.forename: Wen
authors.initials: W
authors.lastname: Zhan
authors.forename: Zheng
authors.initials: Z
authors.lastname: Cai
authors.forename: Shuhu
authors.initials: S
authors.lastname: Du
authors.forename: Xuemin
authors.initials: X
authors.lastname: Zhou
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.forename: Qin
authors.initials: Q
authors.lastname: Hu
mesh_terms: D000327:Adsorption; D001559:Benzhydryl Compounds; D060766:Drinking Water / Q000737:chemistry*; D054802:Molecular Imprinting; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D060766:Drinking Water; D010636:Phenols; D011108:Polymers; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds