MOE Key Laboratory of Aquatic Product Safety, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
J Chromatogr A. 2010 Dec 10;1217(50):7848-54. doi: 10.1016/j.chroma.2010.10.080. Epub 2010 Oct 28.
Two kinds of porous carbon materials, including carbon aerogels (CAs), wormhole-like mesoporous carbons (WMCs), were synthesized and used as the coatings of solid-phase microextraction (SPME) fibers. By using stainless steel wire as the supporting core, six types of fibers were prepared with sol-gel method, direct coating method and direct coating plus sol-gel method. Headspace SPME experiments indicated that the extraction efficiencies of the CA fibers are better than those of the WMC fibers, although the surface area of WMCs is much higher than that of CAs. The sol-gel-CA fiber (CA-A) exhibited excellent extraction properties for non-polar compounds (BTEX, benzene, toluene, ethylbenzene, o-xylene), while direct-coated CA fiber (CA-B) presented the best performance in extracting polar compounds (phenols). The two CA fibers showed wide linear ranges, low detection limits (0.008-0.047μgL(-1) for BTEX, 0.15-5.7μgL(-1) for phenols) and good repeatabilities (RSDs less than 4.6% for BTEX, and less than 9.5% for phenols) and satisfying reproducibilities between fibers (RSDs less than 5.2% for BTEX, and less than 9.9% for phenols). These fibers were successfully used for the analysis of water samples from the Pearl River, which demonstrated the applicability of the home-made CA fibers.
两种多孔碳材料，包括碳气凝胶（CAs）和虫孔状中孔碳（WMCs），被合成并用作固相微萃取（SPME）纤维的涂层。通过使用不锈钢丝作为支撑芯，使用溶胶-凝胶法、直接涂覆法和直接涂覆加溶胶-凝胶法制备了六种纤维。顶空 SPME 实验表明，CA 纤维的萃取效率优于 WMC 纤维，尽管 WMC 的比表面积远高于 CA。溶胶-凝胶-CA 纤维（CA-A）对非极性化合物（BTEX、苯、甲苯、乙苯、邻二甲苯）具有优异的萃取性能，而直接涂覆 CA 纤维（CA-B）在提取极性化合物（苯酚）方面表现出最佳性能。这两种 CA 纤维表现出较宽的线性范围、较低的检测限（BTEX 为 0.008-0.047μg/L，苯酚为 0.15-5.7μg/L）和良好的重复性（BTEX 的 RSDs 小于 4.6%，苯酚的 RSDs 小于 9.5%）以及纤维间良好的重现性（BTEX 的 RSDs 小于 5.2%，苯酚的 RSDs 小于 9.9%）。这些纤维成功地用于分析珠江水样，证明了自制 CA 纤维的适用性。
