00000nam 2200000zi 4500 9.873061 CaOODSP 20241203113648 m o d f cr ||||||||||| 190516e198811##oncad #ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/88-102E-PDF Onuska, Francis I., 1935- author. Supercritical fluid extraction of 2,3,7,8 tetrachloro dibenzo-p-dioxin from sediment samples / by F. I. Onuska & K.A. Terry. Burlington, Ontario, Canada : National Water Research Institute, Research and Applications Branch, Canada Centre for Inland Waters, November 1988. 1 online resource (ii, 8 pages, 7 unnumbered pages) : illustrations, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 88-102 Title from cover. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Supercritical fluid extraction (SFE) of 2,3,7,8 tetrachloro dibenzo-dioxin (2,3,7,8-TCDD) from contaminated sediments is a promising technique for its removal from environmental matrices. The ability of SFE to solubilize many organic contaminants is well documented in industrial processes but its analytical applications were exploited just recently. In this study, supercritical carbon dioxide and nitrous oxide and their mixtures with 2% methanol were used to extract 2,3,7,8-TCDD from aquatic sediments. An attractive feature of this process is that the carbon dioxide, being a virtually inert fluid, leaves no solvent residue on the processed sediment. Almost 100% of the 2,3,7,8-TCDD can be extracted from a sediment spiked with 200 ug/kg 2,3,7,8-TCDD in 30 minutes by using supercriticial carbon dioxide plus 2% methanol. Cleanup procedure is compared with the Soxhlet extraction procedure currently used as a standard method for extracting dioxins from sediment samples"--Abstract, page ii. Includes abstract and management perspective in English and French. gccst Sediments gccst Extraction gccst Methodology Terry, K. A., author. Canada. Environment Canada. National Water Research Institute (Canada). Research and Applications Branch. Canada Centre for Inland Waters. NWRI contribution ; 88-102. (CaOODSP)9.844121 PDF 1.12 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-88-102-eng.pdf