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Expanding the use of polymeric ionic liquids in headspace solid-phase microextraction: Determination of ultraviolet filters in water samples
Journal of Chromatography A ( IF 4.1 ) Pub Date : 2018-01-31 , DOI: 10.1016/j.chroma.2018.01.048
María J. Trujillo-Rodríguez , He Nan , Jared L. Anderson

Three crosslinked polymeric ionic liquid (PIL) sorbent coatings were used in headspace solid-phase microextraction for the determination of a group of ultraviolet filters. The developed crosslinked PIL-based materials include two polycations and a double confined PIL. The method, in combination with gas chromatography-mass spectrometry, is simple, solvent free, and does not require of any derivatization step. After proper optimization of the methodologies with each developed fiber, the analytical performance was compared with a commercial polyacrylate fiber. A study of the normalized calibration slopes, obtained by dividing the calibration slope of each analyte by the coating volume, revealed that the crosslinked fibers can be used as alternatives to commercial fibers for the determination of the selected group of compounds. In particular, the coating nature of the PIL containing the 1-vinylbenzyl-3-hexadecylimidazolium bis[(trifluoromethyl)sulfonyl]imide IL as monomer and the 1,12-di(3-vinylbenzylimidazolium)dodecane bis[(trifluoromethyl)sulfonyl]imide IL as crosslinker is the most suitable for the extraction of the selected compounds despite their coating volume, being 3.6 times lower than the commercial polyacrylate fiber. For this fiber, wide linear ranges, correlation coefficients higher than 0.990, limits of detection ranging from 2.8 ng L−1 to 26 ng L−1 and relative standard deviations ranging from 2.5 to 15% were achieved. Finally, all proposed PIL-based fibers were applied towards the analysis of tap water, pool water and lake water, with the majority of the ultraviolet filters being detected and quantified in the last two types of samples.



中文翻译:

在顶空固相微萃取中扩大聚合离子液体的使用:水样品中紫外线过滤器的测定

在顶空固相微萃取中使用了三种交联的聚合物离子液体(PIL)吸附剂涂层,以确定一组紫外线过滤器。已开发的交联的基于PIL的材料包括两个聚阳离子和一个双约束PIL。该方法与气相色谱-质谱联用,简单,无溶剂,并且不需要任何衍生步骤。在对每种开发的纤维进行适当的方法优化后,将分析性能与商用聚丙烯酸酯纤维进行了比较。通过将每种分析物的校准斜率除以涂层体积获得的归一化校准斜率的研究表明,交联纤维可以用作商业纤维的替代品,用于确定所选化合物组。尤其是,含有1-乙烯基苄基-3-十六烷基咪唑双[(三氟甲基)磺酰基]亚胺IL作为单体和1,12-二(3-乙烯基苄基咪唑鎓)十二烷双[(三氟甲基)磺酰基]亚胺IL作为交联剂的PIL的涂层特性尽管它们的包衣量比商用聚丙烯酸酯纤维低3.6倍,但它还是最适合于提取所选化合物的方法。对于这种光纤,线性范围宽,相关系数高于0.990,检出限为2.8 ng L 比商业聚丙烯酸酯纤维低6倍。对于这种光纤,线性范围宽,相关系数高于0.990,检出限为2.8 ng L 比商业聚丙烯酸酯纤维低6倍。对于这种光纤,线性范围宽,相关系数高于0.990,检出限为2.8 ng L-1到26 ng L -1,相对标准偏差为2.5到15%。最后,所有提议的基于PIL的纤维都用于自来水,池水和湖水的分析,在最后两种类型的样品中检测并定量了大部分的紫外线滤光片。

更新日期:2018-01-31
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