Supercritical carbon dioxide extraction of polycyclic aromatic hydrocarbons from sediments / H.B. Lee and T.E. Peart ; R.L. Hong-You, D.R. Gere. : En13-5/93-56E-PDF
"A supercritical fluid extraction (SFE) method using carbon dioxide was developed for the determination of the 16 USEPA polycyclic aromatic hydrocarbon (PAH) priority pollutants in naturally contaminated sediments. While carbon dioxide is less efficient for the heavier PAH than other fluids such as nitrous oxide and Freon-22, its deficiency was remedied by the use of a mixture of water, methanol, and dichloromethane as modifiers, a higher extraction temperature of 120°C, as well as repetitive extractions. Extraction time can be further reduced to ca. 70 min per sample if a high pressure pump is used for the delivery of the modifiers during dynamic extraction. Except for naphthalene, the SFE results for the 16 PAH obtained from several certified reference materials and sediments samples were comparable to certified or Soxhlet values in terms of both precision and accuracy. The SFE recoveries of naphthalene as well as methyl naphthalenes which were coextracted alongside other PAH and methyl PAH, ranged from 150 to 125% of their respective Soxhlet values due to higher evaporative losses in the Soxhlet procedure"--Abstract.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.878553&sl=1
| Ministère/Organisme | Canada. Environment Canada. National Water Research Institute (Canada) Wastewater Technology Centre (Canada) Hewlett-Packard Company. |
|---|---|
| Titre | Supercritical carbon dioxide extraction of polycyclic aromatic hydrocarbons from sediments / H.B. Lee and T.E. Peart ; R.L. Hong-You, D.R. Gere. |
| Titre de la série | NWRI contribution ; no. 93-56 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (pages 15-16). Includes summaries and abstracts in English and French. |
| Information sur la publication | Burlington, Ontario : National Water Research Institute = Institut national de recherche sur les eaux, [1993] |
| Auteur / Contributeur | Lee, H. B., author. Peart, Thomas E., author. Hong-You, Robert L., author. Gere, Dennis R., author. |
| Description | 1 online resource (4 unnumbered pages, 24 pages) : illustrations. |
| Numéro de catalogue |
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| Descripteurs | Sediments Pollutants Chemistry |
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