title: Solid-phase extraction based on a molecularly imprinted polymer for the selective determination of four benzophenones in tap and river water.
abstract: This work reports the preparation of molecularly imprinted polymer particles for the selective extraction and determination of four benzophenones from aqueous media. The polymer was prepared by using 4-vinylpridine as functional monomer, ethylene glycol dimethacrylate as cross-linker, acetonitrile as porogenic solvent and 2,2',4,4'-tetrehydroxybenzophenone as template. Good specific adsorption capacity (Qmax = 27.90 μmol/g) for 2,2',4,4'-tetrehydroxybenzophenone was obtained in the sorption experiment and good class selectivity for 2,2',4,4'-tetrehydroxybenzophenone, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dehydroxy-4,4'-dimethoxybenzophenone was demonstrated by the chromatographic evaluation experiment. Factors affecting the extraction efficiency of the molecularly imprinted solid-phase extraction procedure were investigated systematically. An accurate and sensitive analytical method based on the molecularly imprinted solid-phase extraction coupled with high-performance liquid chromatography and diode array detection has been successfully developed for the simultaneous determination of four benzophenones from tap water and river water with method detection limits of 0.25-0.72 ng/mL. The recoveries of benzophenones for water samples at two spiking levels (500 and 5000 ng/mL for each benzophenone) were in the range of 86.9-103.3% with relative standard deviations (n = 3) below 9.2%.
authors.affiliation: College of Chemistry, Liaoning University, Shenyang, China.|Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Sun
authors.affiliation: Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.|University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Chaonan
authors.initials: C
authors.lastname: Huang
authors.affiliation: Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.|University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Junyu
authors.initials: J
authors.lastname: Peng
authors.affiliation: Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.|University of Chinese Academy of Sciences, Beijing, China.|College of science, Hebei University of engineering, Handan, China.
authors.forename: Jiajia
authors.initials: J
authors.lastname: Yang
authors.affiliation: Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.|University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Sun
authors.affiliation: College of Chemistry, Liaoning University, Shenyang, China.
authors.forename: Shuliang
authors.initials: S
authors.lastname: Zang
authors.affiliation: Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
authors.forename: Jiping
authors.initials: J
authors.lastname: Chen
authors.affiliation: College of Chemistry, Liaoning University, Shenyang, China.
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Zhang
keywords: Benzophenones; High-performance liquid chromatography; Molecularly imprinted polymers; Solid-phase extraction; Water samples