||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.
||Environmental Research Lab.-Duluth, MN. ;AScI Corp., Duluth, MN.
Water pollution detection;
Polycyclic aromatic hydrocarbons;
TIE(Toxicity identification evaluation);
SPE(Solid phase extraction);
HPLC(High performance liquid chromatography)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.
||Pub. in Jnl. of Chromatography. v629 p67-74 1993. Prepared in cooperation with AScI Corp., Duluth, MN.
|NTIS Title Notes
||Reprint: 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.
||PC A02/MF A01