PMID: 15387165Sep 25, 2004Paper

Microwave-assisted extraction versus Soxhlet extraction for the analysis of short-chain chlorinated alkanes in sediments

Journal of Chromatography. a
J PareraM T Galceran

Abstract

Microwave-assisted extraction (MAE) was evaluated as a possible alternative to Soxhlet extraction for analysing short-chain chlorinated alkanes (commonly called short-chain chlorinated paraffins, SCCPs) in river sediment samples, using gas chromatography coupled to negative chemical ionisation mass spectrometry. For MAE optimisation, several extraction parameters such as solvent extraction mixture, extraction time and extraction temperature were studied. Maximum extraction efficiencies for SCCPs (90%) and for 12 polychlorinated biphenyl (PCB) congeners (91-95%) were achieved using 5 g of sediment sample, 30 ml of n-hexane-acetone (1:1, v/v) as solvent extraction, and 15 min and 115 degrees C of extraction time and temperature, respectively. Activated Florisil was used to clean-up the extracts, allowing highly selective separation of SCCPs from other organic contaminants such as PCBs. MAE was compared with a conventional extraction technique such as Soxhlet and good agreement in the results was obtained. Quality parameters of the optimised MAE method such as run-to-run (R.S.D. 7%) and day-to-day precision (R.S.D. 9%) were determined using spiked river sediment samples, with LODs of 1.5 ng g(-1). This method was successfully appl...Continue Reading

Citations

Sep 1, 2006·Analytical and Bioanalytical Chemistry·F J SantosM T Galceran
Sep 2, 2006·Analytical and Bioanalytical Chemistry·Jacqueline M R Bélanger, J R Jocelyn Paré
Mar 6, 2008·Analytical and Bioanalytical Chemistry·Thomas-Benjamin SeilerHenner Hollert
Sep 1, 2005·Archives of Environmental Contamination and Toxicology·Jan Hüttig, Michael Oehme

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