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RECORD NUMBER: 7 OF 257

OLS Field Name OLS Field Data
Main Title Alternatives to Methanol-Water Elution of Solid-Phase Extraction Columns for the Fractionation of High Log K(sub ow) Organic Compounds in Aqueous Environmental Samples.
Author Durhan, E. ; L'ukasewycz, M. ; Baker., S. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;AScI Corp., Duluth, MN.
Publisher 1993
Year Published 1993
Report Number EPA/600/J-94/184;
Stock Number PB94-163631
Additional Subjects Toxicity ; Organic compounds ; Water pollution detection ; Extraction ; Pore water ; Reprint ; Methanol ; Hydrophobic properties ; Solid phases ; Sediments ; Water analysis ; Industrial water ; Polycyclic aromatic hydrocarbons ; Polychlorinated biphenyls ; Aliphatic hydrocarbons ; Chromatography ; Mass spectrometers ; Toxic substances ; TIE(Toxicity identification evaluation) ; SPE(Solid phase extraction) ; HPLC(High performance liquid chromatography)
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB94-163631 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/01/1994
Collation 10p
Abstract
A toxicity-directed method for fractionating non-polar organic toxicants using solid-phase extraction (SPE) is described in phase II of EPA's 'Methods for aquatic toxicity identification evaluations'. The method has been used very successfully to extract and fractionate acutely and chronically toxic complex effluents and ambient waters. However, when fractionating sampling that contain very hydrophotic (high log K(OW)) toxicants the methanol-water elution sequence requires modification for optimum results. An elution modification has been made to the phase II SPE fractionation method for use with aqueous samples which contain such compounds (e.g. sediment pore water). The modified elution and fractionation method has been found to be effective for the separation and isolation of a mixture of compounds with log K(OW) values ranging from 2.5 to 7 from aqueous solution and for toxicants from a sediment pore water sample.