Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, China.
Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, China.
J Chromatogr A. 2018 Jun 8;1553:7-15. doi: 10.1016/j.chroma.2018.04.014. Epub 2018 Apr 6.
In this work, poly(1-vinylimidazole-ethyleneglycol dimethacrylate) (poly(VI-EDMA)) monolith coated stir bars were synthesized by one-pot polymerization, and they exhibited higher extraction efficiency and faster extraction dynamics for selected PFAAs than commercial ethylene glycol modified silicone (EG-silicone) and polydimethylsiloxane (PDMS) coated stir bars. Taking eleven PFAAs as target analytes, including C4-C12 perfluoroalkyl carboxylates (PFCAs) and C6, C8 perfluoroalkane sulfonates (PFSAs), a method combining monolith-based stir bar sorptive extraction (SBSE) with high performance liquid chromatography (HPLC) - electrospray tandem mass spectrometry (ESI-MS/MS) was proposed for the determination of multiplex PFAAs in environmental water samples. Under the optimized conditions, low limits of detection (0.06-0.40 ng/L) and wide linear range (0.6-400 ng/L) were obtained for target PFAAs with. The developed method was then applied for the analysis of target PFAAs in environmental water samples, and recoveries of 80.1-117% and 80.3-122% were obtained for target PFAAs in spiked Yangtze River and East Lake water samples respectively.
在这项工作中，通过一锅聚合合成了聚（1-乙烯基咪唑-乙二醇二甲基丙烯酸酯）（poly(VI-EDMA)）整体柱涂层搅拌棒，与商用乙二醇改性硅（EG-硅）和聚二甲基硅氧烷（PDMS）涂层搅拌棒相比，其对选定的全氟羧酸（PFAAs）具有更高的萃取效率和更快的萃取动力学。以十一中全氟烷基羧酸（PFCAs）和全氟烷磺酸（PFSAs）作为目标分析物，提出了一种将基于整体柱的搅拌棒吸附萃取（SBSE）与高效液相色谱（HPLC）-电喷雾串联质谱（ESI-MS/MS）相结合的方法，用于测定环境水样中的多组分 PFAAs。在优化条件下，目标 PFAAs 的检出限（0.06-0.40ng/L）低，线性范围宽（0.6-400ng/L）。该方法随后用于分析环境水样中的目标 PFAAs，在长江和东湖水样中，目标 PFAAs 的加标回收率分别为 80.1-117%和 80.3-122%。
