Membrane Dialysis Extraction (MDE): A Novel Approach for Extracting Toxicologically Relevant Hydrophobic Organic Compounds from Soils and Sediments for Assessment in Biotests

The efficiency of membrane dialysis extraction (MDE) to recover toxicologically relevant contaminants from soils and sediments was assessed. Comparing the toxicological potential of MDE extracts to those obtained by conventional Soxhlet extraction assessed the efficiency. The sediment was derived fr...

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Veröffentlicht in:Journal of soils and sediments 2006-02, Vol.6 (1), p.20-29
Hauptverfasser: Seiler, Thomas-B., Rastall, Andrew, Leist, Erik, Erdinger, Lothar, Braunbeck, Thomas, Hollert, Henner
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Sprache:eng
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Zusammenfassung:The efficiency of membrane dialysis extraction (MDE) to recover toxicologically relevant contaminants from soils and sediments was assessed. Comparing the toxicological potential of MDE extracts to those obtained by conventional Soxhlet extraction assessed the efficiency. The sediment was derived from a larger near-surface sample taken at the Upper-Rhine at Iffezheim in a depth of 4 cm in 2001. Toxicologically relevant hydrophobic organic compounds were extracted from wet and dry sediments by sealing replicate samples in individual lengths of pre-cleaned low-density polyethylene (LD-PE) tubing and then dialyzing in n-hexane. Membrane dialysis extraction was found to be a simple, efficient and cost-effective method for the extraction of sediment samples. The size-selectivity of the LD-PE membrane also appeared to have the capacity to increase the bioavailability of potential target analytes in the resulting extracts by retaining much of the organic macromolecules present in the sample.
ISSN:1439-0108
1614-7480
DOI:10.1065/jss2006.01.151