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0019.878553
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008190827s1993    onca    ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
0861 |aEn13-5/93-56E-PDF
1001 |aLee, H. B., |eauthor.
24510|aSupercritical carbon dioxide extraction of polycyclic aromatic hydrocarbons from sediments / |cH.B. Lee and T.E. Peart ; R.L. Hong-You, D.R. Gere.
264 1|aBurlington, Ontario : |bNational Water Research Institute = Institut national de recherche sur les eaux, |c[1993]
300 |a1 online resource (4 unnumbered pages, 24 pages) : |billustrations.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aNWRI contribution ; |vno. 93-56
500 |aDigitized edition from print [produced by Environment and Climate Change Canada].
504 |aIncludes bibliographical references (pages 15-16).
5203 |a"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.
546 |aIncludes summaries and abstracts in English and French.
69207|2gccst|aSediments
69207|2gccst|aPollutants
69207|2gccst|aChemistry
7001 |aPeart, Thomas E., |eauthor.
7001 |aHong-You, Robert L., |eauthor.
7001 |aGere, Dennis R., |eauthor.
7101 |aCanada. |bEnvironment Canada.
7102 |aNational Water Research Institute (Canada)
7102 |aWastewater Technology Centre (Canada)
7102 |aHewlett-Packard Company.
830#0|aNWRI contribution ;|vno. 93-56.|w(CaOODSP)9.844121
85640|qPDF|s2.20 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-93-56-eng.pdf