科研之友
微信
新浪微博
Facebook
分享链接
摘要
Ionic liquid of 1-octadecyl-3-(gamma-triethoxysiliconpropyl) imidazole bromide(C18IL) was synthesized and then used as a functional monomer to produce the in. tube solid microextraction monolithic column(C18IL in-tube SPME) via sol. gel reaction. After that, five polycyclic aromatic hydrocarbons(PAHs), naphthalene, fluorine, phenanthrene, fluoranthene and pyrene, were employed as probe analytes to evaluate the preparation method of the column and optimize the extraction conditions. Finally, a method of C18IL in-tube SPME hyphen gas chromatography was established for the determination of PAHs in water. The limits of detection(LODs, S/N=3) were between 0.007 and 0.072 mu g/L, and the limits of quantification(LOQs, S/N=10) varied from 0.023 to 0.24 mu g/L. The intra. and inter. day relative standard deviations(RSDs) of the PAHs were below 10% except for that of phenanthrene. The proposed method was also applied to the determination of the PAHs in a coffee sample, and the recoveries for the five PHAs(spiked in the coffee sample at three levels) ranged from 85.79% to 103.42%.
