Preparation of dummy-imprinted polymers by Pickering emulsion polymerization for the selective determination of seven bisphenols from sediment samples
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- 作者：Hao Sun ; Yun Li ; Jiajia Yang ; Xiaoli Sun ; Chaonan Huang ; Xiangdong Zhang and Jiping Chen
- 刊名：Journal of Separation Science
- 出版年：2016
- 出版时间：June 2016
- 年：2016
- 卷：39
- 期：11
- 页码：2188-2195
- 全文大小：1076K
- ISSN：1615-9314
文摘
The dummy molecularly imprinted polymers were prepared by Pickering emulsion polymerization. 4,4′-(1-Phenylethylidene) bisphenol was selected as the dummy template to avoid the leakage of the target bisphenols. The microsphere particles were characterized by scanning electron microscopy and nitrogen adsorption–desorption measurements, demonstrating that the regular-shaped and medium-sized particles (40–70 μm) were obtained with a specific surface area of 355.759 m2/g and a total pore volume of 0.561 cm3/g. The molecular imprinting properties of the particles were evaluated by static adsorption and chromatographic evaluation experiments. The association constant and maximum adsorption amount of bisphenol A were 0.115 mmol/L and 3.327 μmol/g using Scatchard analysis. The microsphere particles were then used as a solid-phase extraction sorbent for selective extraction of seven bisphenols. The method of dummy molecularly imprinted solid-phase extraction coupled with high-performance liquid chromatography and diode array detection was successfully established for the extraction and determination of seven bisphenols from environmental sediment samples with method detection limits of 0.6–1.1 ng/g. Good recoveries (75.5–105.2%) for sediment samples at two spiking levels (500 and 250 ng/g) and reproducibility (RSDs < 7.7%, n = 3) were obtained.