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Comparison of supercritical fluid and Soxhlet extractions for the isolation of nitro compounds from soils
Author(s) -
Bajerová Petra,
Eisner Aleš,
Ježová Věra,
Adam Martin,
Ventura Karel
Publication year - 2008
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200700561
Subject(s) - chromatography , supercritical fluid extraction , chemistry , extraction (chemistry) , supercritical fluid , sample preparation , gas chromatography–mass spectrometry , mass spectrometry , acetonitrile , accelerated solvent extraction , gas chromatography , solvent , organic chemistry
Supercritical fluid extraction (SFE) with CO 2 , a clean and rapid alternative to conventional Soxhlet extraction, was investigated for the extraction of nitro compounds from soil samples. Quantitative extraction by SFE was accomplished at a pressure of 25 MPa and an extraction temperature of 60°C, for 30 min in dynamic mode and using acetonitrile as modifier, and the results were comparable with those obtained by acetonitrile Soxhlet extraction (3 h) for all soil samples. Extracts from these two procedures were analyzed by gas chromatography coupled with mass spectrometry. Quantitative reproducibility for SFE extracts was acceptable (RSD 2–10%), and the quantity of solvent was reduced from 160 mL for Soxhlet extraction to 5 mL in the case of SFE.