Solid‐phase extraction based on a molecularly imprinted polymer for the selective determination of four benzophenones in tap and river water |
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Authors: | Hao Sun Yun Li Chaonan Huang Junyu Peng Jiajia Yang Xiaoli Sun Shuliang Zang Jiping Chen Xiangdong Zhang |
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Affiliation: | 1. College of Chemistry, Liaoning University, Shenyang, China;2. Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China;3. University of Chinese Academy of Sciences, Beijing, China;4. College of science, Hebei University of engineering, Handan, China |
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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%. |
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Keywords: | Benzophenones High‐performance liquid chromatography Molecularly imprinted polymers Solid‐phase extraction Water samples |
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