Use of cotton as a sorbent for on-line precolumn enrichment of polycyclic aromatic hydrocarbons in waters prior to liquid chromatography determination |
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Authors: | Jing-fu Liu Gui-bin Jiang Chao Tai |
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Institution: | a Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, PR China b Department of Chemistry, Shandong University, Jinan 250100, PR China |
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Abstract: | Using cotton as a solid-phase extraction sorbent of the precolumn, an on-line coupled precolumn preconcentration-liquid chromatography system with fluorescence detection was developed for the determination of PAHs in aqueous samples. Four PAHs including fluorene, phenanthrene, fluoranthene and benzok]fluoranthene were preconcentrated by a precolumn packed with 30 mg of absorbent cotton and then separated by C18 analytical column. When 100 ml of sample was enriched, the proposed procedure provided detection limits in the range of 0.5-57 ng l−1. Several water samples spiked with PAHs were analyzed with recoveries in the range of 92-119% at spiking level of 100 ng l−1 for fluorene, phenanthrene and fluoranthene, and 10 ng l−1 for benzok]fluoranthene, respectively. |
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Keywords: | Cotton Precolumn Liquid chromatography |
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