Comparison of pressurised liquid extraction with Soxhlet extraction for the analysis of polychlorinated dibenzo- p-dioxins and dibenzofurans from fly ash and environmental matrices

Dynamic high-pressure solvent extraction is a new, rapid and solvent-saving extraction technique for performing pressurised liquid extractions. The technique uses conventional solvent or mixtures of solvents for the extraction of solid material under elevated temperature and pressure. A continuous f...

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Bibliographic Details
Published in:Journal of Chromatography A 1998-07, Vol.815 (2), p.231-241
Main Authors: Bautz, H, Polzer, J, Stieglitz, L
Format: Article
Language:English
Subjects:
Air
Analysis methods
Analytical chemistry
Applied sciences
Atmospheric pollution
Biological and medical sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Environmental pollutants toxicology
Exact sciences and technology
Gas chromatographic methods
Medical sciences
Pollution
Polychlorinated dibenzodioxins
Polychlorinated dibenzofurans
Soil and sediments pollution
Toxicology
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Summary:Dynamic high-pressure solvent extraction is a new, rapid and solvent-saving extraction technique for performing pressurised liquid extractions. The technique uses conventional solvent or mixtures of solvents for the extraction of solid material under elevated temperature and pressure. A continuous flow of fresh solvent during the extraction provides for a high extraction efficiency, short extraction times and low solvent consumption. The extraction device and the optimisation of the extraction procedure shall be described. For demonstrating the applicability of this technique, polychlorinated dibenzodioxins and -furans were extracted from different matrices which include fly ash, filter dust, and soil. Soxhlet extractions were performed as a reference method. The comparative results show that dynamic high-pressure solvent extraction provides extraction efficiencies equal to, or even higher, than Soxhlet.
ISSN:0021-9673
DOI:10.1016/S0021-9673(98)00453-1