A monolithic fiber of poly(butyl methacrylate-ethylene glycol dimethacrylate)[poly(BMA-EDMA)] was prepared using deep eutectic solvent(DES)of choline chloride-ethanediol as a porogen. The prepared fibers were applied to direct extraction of three polycyclic aromatic hydrocarbons(PAHs)in lake water sam-ples by solid phase microextraction(SPME). The extracts were determined by ultra performance liquid chroma-tography(UPLC). The fiber without DES was prepared at the same time. Both fibers(with and without DES) were compared with a commercial polydimethylsiloxane(PDMS)fiber. The highest extraction efficiency was clearly obtained with poly(BMA-EDMA)fiber. The extraction time,extraction solvent,desorption time, desorption solvent,and ionic strength were optimized. Under the optimum conditions,the linear ranges for the three PAHs(naphthalene,biphenyl,and phenanthrene)were 0.1-6.0 mg/L(r≥0.990 3). The limits of detec-tion(LODs)of the three PAHs were in the range of 2.1-4.9 μg/L. The recoveries of the three PAHs spiked in lake water samples were 86.4%-111.3% with relative standard deviations(RSDs,n=6)of 11.2%-15.1%. This method is simple,stable,and inexpensive,and can be used for the determination of the PAHs in lake water samples.%采用氯化胆碱-乙二醇低共熔溶剂(DES)作致孔剂,制备了聚(甲基丙烯酸丁酯-乙二醇二甲基丙烯酸酯) [poly(BMA-EDMA)]固相微萃取头,并与超高效液相色谱法(UPLC)结合测定了湖水中的3种多环芳烃(PAHs).实验与不使用 DES致孔剂的固相微萃取头和商品化聚二甲硅氧烷(PDMS)萃取头进行比较,含 DES的poly(BMA-EDMA)固相微萃取头的富集效果最好.系统考察了萃取条件(萃取时间、萃取溶剂、解吸时间、解吸溶剂及离子强度)对水样中多环芳烃萃取效率的影响.在最优的实验条件下,3种多环芳烃类化合物(萘、联苯、菲)的线性范围为0.1~6.0 mg/L(r≥0.9903),检出限为2.1~4.9 μg/L,回收率为86.4%~111.3%,相对标准偏差(RSD, n=6)为11.2%~15.1%.该法操作简便,稳定性好,成本低,适用于实际环境水样中多环芳烃类化合物的测定.
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