Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Supercritical Fluid Extraction of Particulate and Adsorbent Materials. Part 2.
Author Wright, B. W. ; Smith, R. D. ;
CORP Author Battelle Pacific Northwest Labs., Richland, WA.;Environmental Monitoring Systems Lab., Research Triangle Park, NC.
Year Published 1987
Report Number EPA/600/4-87/040;
Stock Number PB88-133699
Additional Subjects Extraction ; Recovery ; Aromatic polycyclic hydrocarbons ; Comparison ; Absorbents ; Air pollution control ; Semivolatile organic compounds
Library Call Number Additional Info Location Last
NTIS  PB88-133699 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 80p
The physical properties of supercritical fluids allow similar solvent strengths as liquids, but with higher diffusion coefficients, lower viscosities and an extended temperature range which provides the potential for more rapid and efficient extraction rates than possible with liquids. The report describes expanded studies conducted to evaluate the applicability and efficiency of analytical supercritical fluid extraction and related methodologies. These studies included the development of quantitative off-line supercritical fluid extraction methodology and a comparison to traditional Soxhlet extraction, the development and evaluation of on-line supercritical fluid extraction-gas chromatography for combined sample preparation and analysis, and direct supercritical fluid extraction-mass spectrometry for the monitoring of specific extraction profiles as a function of time. The sample matrices included an air particulate sample and XAD-2 resin, polyurethane foam, and Spherocarb adsorbents that were spiked with various model compounds. Carbon dioxide, isobutane, and methanol modified (20 mole %) carbon dioxide were utilized as supercritical fluid systems. Related studies on the evaluation of the quantitative analysis capability of a fluorescence detection supercritical fluid chromatography method and the development of viable solute focusing methods for capillary supercritical fluid chromatography were also conducted.