Novel sponge-like molecularly imprinted mesoporous silica material for selective isolation of bisphenol A and its analogues from sediment extracts.
Novel sponge-like molecularly imprinted mesoporous silica material for selective isolation of bisphenol A and its analogues from sediment extracts.
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DOI：
10.1016/j.aca.2014.09.051
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发表时间：
2015
影响因子：
6.2
通讯作者：
Jiajia Yang;Yun Li;Jincheng Wang;Xiaoli Sun;Syed Mazhar Shah;Rong Cao;Jiping Chen
中科院分区：
文献类型：
--
作者：
Jiajia Yang;Yun Li;Jincheng Wang;Xiaoli Sun;Syed Mazhar Shah;Rong Cao;Jiping Chen
采用半共价分子印迹和简单自组装相结合的方法合成了双酚A（BPA）印迹海绵介孔氧化硅。采用红外光谱、扫描电镜、透射电镜和氮气吸附-脱附等手段对所得分子印迹海绵介孔氧化硅材料进行了表征。结果表明，MISMS具有较大的比表面积（850.55 m2 g −1）和高度互连的三维多孔网络。结果表明，MISMS对BPA具有169.22 μmol g− 1的上级比吸附容量和快速吸附动力学（3 min内达到平衡）。吸附实验表明，该树脂对双酚A及其类似物（双酚F、双酚B、双酚E和双酚AF）具有良好的选择性。MISMS作为固相萃取（SPE）材料，然后评价这些双酚（BPs）从沉积物样品的分离和清理。建立了一种准确、灵敏的MISMS-SPE-HPLC-DAD分析方法，可同时测定河流沉积物中5种BPs，检出限为0.43-0.71 ng g− 1干重（dw）。在两个加标水平（每种BP为50和500 ng g−1dw）下，冻干沉积物样品中BP的回收率在75.5-105.5%范围内，RSD值低于7.5%。
Bisphenol A (BPA) imprinted sponge mesoporous silica was synthesized using a combination of semi-covalent molecular imprinting and simple self-assembly process. The molecularly imprinted sponge mesoporous silica (MISMS) material obtained was characterized by FT-IR, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption–desorption measurements. The results show that the MISMS possessed a large specific surface area (850.55 m2g−1) and a highly interconnected 3-D porous network. As a result, the MISMS demonstrated a superior specific adsorption capacity of 169.22 μmol g−1and fast adsorption kinetics (reaching equilibrium within 3 min) for BPA. Good class selectivity for BPA and its analogues (bisphenol F, bisphenol B, bisphenol E and bisphenol AF) was also demonstrated by the sorption experiment. The MISMS as solid-phase extraction (SPE) material was then evaluated for isolation and clean-up of these bisphenols (BPs) from sediment samples. An accurate and sensitive analytical method based on the MISMS–SPE coupled with HPLC–DAD has been successfully established for simultaneous determination of five BPs in river sediments with detection limits of 0.43–0.71 ng g−1dry weight (dw). The recoveries of BPs for lyophilizated sediment samples at two spiking levels (50 and 500 ng g−1dw for each BP) were in the range of 75.5–105.5% with RSD values below 7.5%.