Journal
TALANTA
Volume 78, Issue 1, Pages 156-164Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2008.10.048
Keywords
Soils; PAHs; Pressurized liquid extraction; Ultrasonic extraction; GC-MS/MS
Categories
Funding
- Andalusian Regional Government (Regional Ministry of Innovation, Science, and Enterprise) [P07-AGR-02922]
- Juan de la Cierva Program (Spanis Ministry of Science and Innovation-EFS)
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A pressurized liquid extraction (PLE) method has been optimized for the determination of polycyclic aromatic hydrocarbons (PAHs) in soil samples and it was compared with ultrasonic extraction. The extraction step was followed by gas chromatography-triple quadrupole mass spectrometry (GC-QqQ-MS/MS) analysis. Parameters such as type of solvent, extraction time, extraction temperature and number of extractions were optimized. There were no significant differences among the two extraction methods although better extraction efficiencies were obtained when PLE was used, minimizing extraction time and solvent consumption. PLE procedure was validated, obtaining limits of detection (LODs) ranging from 0.02 to 0.75 mu g kg(-1) and limits of quantification (LOQs) ranging from 0.07 to 2.50 mu g kg(-1) for the selected PAHs. Recoveries were in the range of 59-110%, except for naphthalene, which was the most volatile PAR Finally, the method was applied to real soil samples from Southeast of Spain. PAHs concentrations were low, and phenanthrene, pyrene, fluorene, benzo[a]pyrene and chrysene were the most frequently detected analytes in the samples. (C) 2008 Elsevier B.V. All rights reserved.
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