期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1163, 期 1-2, 页码 288-297出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2007.06.031
关键词
membrane-assisted solvent extraction (MASE); large volume injection-GC-MS; polycyclic aromatic hydrocarbons (PAHs); aqueous samples; food samples
Membrane-assisted solvent extraction (MASE) in combination with large volume injection-gas chromatography-mass spectrometry (LVI-GC-MS) was applied for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) in aqueous samples. The MASE conditions were optimized for achieving high enrichment of the analytes from aqueous samples, in terms of extraction conditions (shaking speed, extraction temperature and time), extraction solvent and composition (ionic strength, sample pH and presence of organic solvent). Parameters like linearity and reproducibility of the procedure were determined. The extraction efficiency was above 65% for all the analytes and the relative standard deviation (RSD) for five consecutive extractions ranged from 6 to 18%. At optimized conditions detection limits at the ng/L level were achieved. The effectiveness of the method was tested by analyzing real samples, such as river water, apple juice, red wine and milk. (C) 2007 Elsevier B.V. All rights reserved.
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