Chen Lei, Huang Xiaojia
State Key Laboratory of Marine Environmental Science, Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, College of the Environment and Ecology, Xiamen University, Xiamen 361005, China.
State Key Laboratory of Marine Environmental Science, Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, College of the Environment and Ecology, Xiamen University, Xiamen 361005, China; Shenzhen Research Institute of Xiamen University, Shenzhen, China.
J Chromatogr A. 2016 Sep 30;1466:42-9. doi: 10.1016/j.chroma.2016.09.011. Epub 2016 Sep 5.
In this study, coextraction of acidic, basic and neutral pollutants was realized with a new adsorbent based on polymeric ionic liquid (PIL). In the presence of a porogen solvent containing 1-propanol and 1,4-butanediol, an ionic liquid, 1-vinyl-3-octylimidazolium tetrafluoraborate was used as monomer to copolymerize with dual cross-linkers (divinylbenzene and N,N-methylene-bisacrylamide) to form the adsorbent for stir cake sorptive extraction (SCSE). Phenols, aromatic amines and parabens were selected as acidic, basic and neutral model analytes, respectively. The effects of preparation conditions and extraction parameters on the extraction performance of SCSE/PIL were investigated thoroughly. Under the optimized conditions, the prepared adsorbent showed satisfactory coextraction performance to the selected analytes with multiply interactions. At the same time, simple and sensitive analytical method for simultaneous determination of phenols, aromatic amines and parabens in environmental water samples was developed by the combination of SCSE/PIL with high-performance liquid chromatography with diode array detection. Low limits of detection (S/N=3) and quantification limits (S/N=10) of the proposed method for the targeted analytes were achieved within the range of 0.064-0.30μg/L and 0.21-0.99μg/L, respectively. The precision of the proposed method was evaluated in terms of intra- and inter-assay variability calculated as relative standard deviation (RSD), and it was found that the RSD values were all below 10%. Ultimately, the applicability of developed method was successfully confirmed by analyzing lake, reservoir and river water samples. Recoveries obtained for the determination of targeted analytes in spiking samples ranged from 70.0% to 112%, with RSDs within the range of 1.6-9.8%.
在本研究中，基于聚合离子液体（PIL）的新型吸附剂实现了酸性、碱性和中性污染物的共萃取。在含有1-丙醇和1,4-丁二醇的致孔剂溶剂存在下，离子液体1-乙烯基-3-辛基咪唑四氟硼酸盐用作单体与双交联剂（二乙烯基苯和N,N-亚甲基双丙烯酰胺）共聚，形成用于搅拌棒吸附萃取（SCSE）的吸附剂。分别选择酚类、芳香胺类和对羟基苯甲酸酯类作为酸性、碱性和中性模型分析物。深入研究了制备条件和萃取参数对SCSE/PIL萃取性能的影响。在优化条件下，制备的吸附剂对选定的分析物表现出令人满意的共萃取性能，存在多种相互作用。同时，通过将SCSE/PIL与带二极管阵列检测的高效液相色谱相结合，开发了一种简单、灵敏的同时测定环境水样中酚类、芳香胺类和对羟基苯甲酸酯类的分析方法。该方法对目标分析物的检测限（S/N=3）和定量限（S/N=10）分别在0.064 - 0.30μg/L和0.21 - 0.99μg/L范围内。该方法的精密度通过以相对标准偏差（RSD）计算的批内和批间变异性进行评估，发现RSD值均低于10%。最终，通过分析湖泊、水库和河水样品成功证实了所开发方法的适用性。加标样品中目标分析物测定的回收率在70.0%至112%之间，RSD在1.6 - 9.8%范围内。
