Blanco-Zubiaguirre Laura, Delgado Alejandra, Ros Oihana, Posada-Ureta Oscar, Vallejo Asier, Prieto Ailette, Olivares Maitane, Etxebarria Nestor
Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080, Bilbao, Spain.
Environ Sci Pollut Res Int. 2014 Oct;21(20):11867-83. doi: 10.1007/s11356-013-2481-4. Epub 2014 Jan 15.
Among the different organic pollutants, persistent organic pollutants and emerging organic contaminants (EOCs) are of particular concern due to their potentially dangerous effects on the ecosystems and on human health. In the framework of the analysis of some of these organic pollutants in water samples, sorptive extraction devices have proven to be adequate for their monitoring. The efficiency of four commercially available and low-cost polymeric materials [polypropylene, poly(ethylene terephthalate), Raffia, and polyethersulfone (PES)] for the simultaneous extraction of 16 organic compounds from five different families from environmental water samples was evaluated in this work. Firstly, the homogeneity of the sorbent materials was confirmed by means of Raman spectroscopy. After the optimization of the parameters affecting the extraction and the liquid desorption steps, it was found that PES showed the largest efficiencies for slightly polar analytes and, to a lesser extent, for nonpolar analytes. Additionally, Raffia rendered good extraction efficiencies for nonpolar compounds. Thus sorptive extraction methods followed by large volume injection-programmable temperature vaporizer-gas chromatography-mass spectrometry were validated using PES and Raffia as sorbent materials. The validation of the method provided good linearity (0.978 < r (2) < 0.999 for PES and 0.977 < r (2) < 0.999 for Raffia), adequate repeatability (below 19 % and 14 % for PES and Raffia, respectively), and low method detection limits (low ng · l(-1) level). Finally, these materials were applied to the analysis of contaminants in environmental water samples.
在不同的有机污染物中，持久性有机污染物和新兴有机污染物（EOCs）因其对生态系统和人类健康的潜在危险影响而备受关注。在对水样中的一些有机污染物进行分析的框架下，吸附萃取装置已被证明适用于它们的监测。在这项工作中，评估了四种市售低成本聚合材料[聚丙烯、聚对苯二甲酸乙二酯、酒椰纤维和聚醚砜（PES）]从环境水样中同时萃取五个不同家族的16种有机化合物的效率。首先，通过拉曼光谱法确认了吸附剂材料的均匀性。在优化影响萃取和液体解吸步骤的参数后，发现PES对微极性分析物显示出最高效率，对非极性分析物的效率相对较低。此外，酒椰纤维对非极性化合物具有良好的萃取效率。因此，使用PES和酒椰纤维作为吸附剂材料，对随后采用大体积进样-程序升温汽化器-气相色谱-质谱联用的吸附萃取方法进行了验证。该方法的验证提供了良好的线性（PES的r (2)为0.978 < r (2) < 0.999，酒椰纤维的r (2)为0.977 < r (2) < 0.999）、足够的重复性（PES和酒椰纤维分别低于19%和14%）以及较低的方法检测限（低ng·l(-1)水平）。最后，将这些材料应用于环境水样中污染物的分析。
