Accession Number : ADA326015
Title : Preparing Soil Samples for Volatile Organic Compound Analysis,
Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Personal Author(s) : Hewitt, Alan D.
PDF Url : ADA326015
Report Date : APR 1997
Pagination or Media Count : 25
Abstract : Three equilibrium headspace and three solvent extraction methods of preparing soil samples for determining volatile organic compounds (VOCs) were compared. Soil samples were spiked with five gasoline range aromatic compounds and four chlorinated compounds using two different laboratory procedures that limit volatilization and biodegradation losses. All comparisons were made with sample triplicates of one or more soil types. Recovery efficiencies for the preparation methods depended on soil organic carbon content, octanol-water partition coefficients of specific analytes, length of solvent extraction, and the spiking procedure used. In general, methanol extraction was the most robust method for recovering spiked VOCs. Recovery efficiencies for VOCs with tetraethylene glycol dimethyl ether and poly(propylene)glycol, as well as three equilibrium headspace methods, varied with the parameters tested.
Descriptors : *SOILS, *ORGANIC COMPOUNDS, *CHEMICAL ANALYSIS, METHYL RADICALS, POLYMERS, CARBON, METHANOLS, ORGANIC MATERIALS, SAMPLING, ETHERS, VOLATILITY, LOSSES, AROMATIC COMPOUNDS, BIODEGRADATION, CHLORINATION, GASOLINE, SOLVENT EXTRACTION, ETHYLENE GLYCOL, ORGANIC CHEMISTRY, PROPYLENE GLYCOL.
Subject Categories : Organic Chemistry
Geology, Geochemistry and Mineralogy
Distribution Statement : APPROVED FOR PUBLIC RELEASE