摘要
利用聚乙二醇2000（PEG2000）合成了聚乙二醇硅酯预聚物，并通过溶胶-凝胶法制备了含键合聚乙二醇硅酯的固相微萃取涂层，其使用最高温度为340℃。无需衍生化的情况下，采用顶空固相微萃取结合GC／FID的方法测定3种多氯酚的检出限为0．11～0．18ng／L；线性范围达0．1～10^3μg／L，相对标准偏差（RSD，n=5）为4．24％～6．44％。土样中痕量多氯酚的加标回收率分别为108％、93．5％和73.7％。
The solid-phase microextraction （SPME） fiber was prepared by the sol-gel method using labsynthesized polyethylene glycol （PEG） 2000 silicate. Then three tri-, tetra- and penta-substituted chlorophenols were determinated for evaluation. The fiber proved to be very stable at 340℃. Without derivation, the linearity was from 0.1μg/L to 10^3 μg/L and limits of detection varied from 0.11 ng/L to 0. 18 ng/L using head speac-solid phase microextraction-gas chromatography-flame ionization detection （HS-SPME-GC-FID）. Relative standard deviations （ n = 5 ） were found to be 4.2% - 6.4% and this fiber had greater extraction capacity than that of commercial SPME fibers such as polydimethylsiloxane （PDMS） and carbowax divinylbenzene （CW/DVB）. The method was applied for the determination of trace chlorophenols in soil samples with the recoveries of 108% , 93.5% , 73.7%, respectively.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期91-94,共4页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金资助项目(No.20245003)
关键词
固相微萃取
PEG硅酯
氯酚
Solid-phase microextraction, polyethylene glycol.silicate, chlorophenol
