Department of Chemistry, School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, MS 602, Toledo, OH 43606, USA.
Talanta. 2014 Jan;118:172-9. doi: 10.1016/j.talanta.2013.10.014. Epub 2013 Oct 14.
Crosslinked polymeric ionic liquid (PIL)-based sorbent coatings were employed in the extraction of 21 polychlorinated biphenyls (PCBs) from ocean water and bovine milk using solid-phase microextraction (SPME). The extraction temperature, time, and concentration of sodium chloride added to the matrix were optimized in order to determine the best extraction conditions for the extraction of PCBs. The analytical performance of the crosslinked PIL-based SPME fibers was compared with a commercial 7 µm polydimethylsiloxane (PDMS) fiber using gas chromatography (GC) employing an electron capture detector (ECD) and mass spectrometric detection (MS). Higher sensitivities for PCBs were achieved using PIL-based fibers when compared to PDMS fiber due to the incorporation of benzyl moieties into the PIL structures. The limits of detection (LOD) for all PCBs were determined to be in the low ng L(-1) range using the three studied coatings. Recovery studies were performed for PCBs in ocean water and bovine milk to validate the applicability of the current SPME method.
交联聚合离子液体（PIL）基吸附剂涂层被用于固相微萃取（SPME）从海水和牛奶中萃取 21 种多氯联苯（PCBs）。优化了萃取温度、时间和向基质中添加的氯化钠浓度，以确定萃取 PCB 的最佳萃取条件。使用电子俘获检测器（ECD）和质谱检测（MS）的气相色谱（GC）比较了交联 PIL 基 SPME 纤维与商业 7 µm 聚二甲基硅氧烷（PDMS）纤维的分析性能。与 PDMS 纤维相比，PIL 基纤维由于在 PIL 结构中引入了苄基部分，因此对 PCB 的灵敏度更高。使用三种研究涂层，所有 PCB 的检测限（LOD）均确定为低 ng L(-1) 范围内。进行了 PCB 在海水和牛奶中的回收率研究，以验证当前 SPME 方法的适用性。
