期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1214, 期 1-2, 页码 11-16出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2008.10.062
关键词
Cloud point extraction; Preconcentration; Soil; Polycyclic aromatic hydrocarbons
Cloud point methodology has been used to develop a novel preconcentration and an analytical method for polycyclic aromatic hydrocarbons (PAHs) in soil sample. The nonionic surfactant Tergitol 15-S-7 was successfully used as the surfactant-mediated extractant in both ultrasonic and microwave-assisted extractions. Over 90% of recoveries for various PAHs in soil were obtained under the optimal experimental conditions. The extracts were then preconcentrated and analyzed by our proposed on-line coupling method flow injection-cloud point preconcentration-high-performance liquid chromatography (FI-CPP-HPLC) equipped with a fluorescence detector and an excitation/emission wavelength program. The preconcentration system and optimal working conditions were established. The limit of detection of the FI-CPE-HPLC system ranges from 0.101 to 0.456 mu g/L for the selected PAHs, i.e., phenanthrene. pyrene, chrysene, benzo[k]fluoranthene and benzo[a]pyrene. Our proposed technique provides a reliable, simple and automatic analytical method for the determination of PAHs in environmental soil samples. (c) 2008 Elsevier B.V. All rights reserved.
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