Tian Yuan, Feng Xilan, Zhang Yuping, Yu Quan, Wang Xiaohao, Tian Mengkui
Division of Advanced Manufacturing, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, China.
School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China.
Polymers (Basel). 2020 Feb 2;12(2):292. doi: 10.3390/polym12020292.
Ionic liquids found a wide application in catalysis and extraction due to their unique properties. Herein, ethylene glycol dimethacrylate as the cross-linker and 1-vinyl-3- butylimidazolium tetrafluoroborate as functional monomer via thermally initiated free-radical polymerization was prepared as a novel copolymer solid phase micro-extraction (SPME) coating. A surface modified stainless-steel wire was implemented as the substrate. Factors affecting the extraction performances of the copolymer, including the molar ratio of monomers to cross-linkers, the amount of porogen agent, and polymerization time were evaluated and optimized. To evaluate the extraction performance, five commonly seen polycyclic aromatic hydrocarbons (PAHs) were taken as the analytical targets. The potential factors affecting extraction efficiency were optimized. The as-prepared SPME device, coupled with gas chromatography, was successfully applied for the determination of PAHs in water samples. The wide linear range, low detection limit, good reproducibility, selectivity, and excellent thermal stability indicate the promising application of the newly developed SPME fiber in environmental monitoring as well as in other samples having complex matrices.
离子液体因其独特的性质在催化和萃取领域有着广泛的应用。在此，通过热引发自由基聚合反应，以乙二醇二甲基丙烯酸酯作为交联剂、1-乙烯基-3-丁基咪唑四氟硼酸盐作为功能单体，制备了一种新型共聚物固相微萃取（SPME）涂层。以表面改性的不锈钢丝作为基底。对影响共聚物萃取性能的因素进行了评估和优化，这些因素包括单体与交联剂的摩尔比、致孔剂的用量以及聚合时间。为评估萃取性能，选取了五种常见的多环芳烃（PAHs）作为分析目标物。对影响萃取效率的潜在因素进行了优化。所制备的SPME装置与气相色谱联用，成功应用于水样中PAHs的测定。宽线性范围、低检测限、良好的重现性、选择性以及优异的热稳定性表明，新开发的SPME纤维在环境监测以及其他具有复杂基质的样品分析中具有广阔的应用前景。
