Record Display for the EPA National Library Catalog

RECORD NUMBER: 331 OF 2070

OLS Field Name OLS Field Data
Main Title Comparison of Common Solvent Evaporation Techniques in Organic Analysis.
Author Erickson, Mitchell D. ; Giguere, Mart T. ; Whitaker, Donald A. ;
CORP Author Research Triangle Inst., Research Triangle Park, NC.;Environmental Monitoring and Support Lab., Cincinnati, OH.
Year Published 1981
Report Number EPA-68-03-2759; EPA-600/J-81-379;
Stock Number PB82-128166
Additional Subjects Water analysis ; Solvent extraction ; Organic compounds ; Chemical analysis ; Water pollution ; Evaporation ; Concentration(Composition) ; Laboratory equipment ; Reprints ; Water pollution detection
Holdings
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Status
NTIS  PB82-128166 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 19p
Abstract
Isolation of organic constituents from water frequently involves an extraction with a large volume of organic solvent which must be reduced to achieve the desired sensitivity. The objective of this research was to evaluate common solvent evaporation techniques to determine which are acceptable for use in pollutant analysis. Techniques for solvent reduction from 200 to 10 mL (macro) and 8 to 0.2 mL (micro) were evaluated. The macro concentration techniques included Kuderna-Danish (K-D) concentration, rotary evaporation, evaporation on a hot plate in an Erlenmeyer flask, and heated nitrogen blowdown with a modified Snyder column. A series of model compounds covering a wide range of boiling points (108 and 323C) and polarity was used. Based upon recovery efficiency alone, nitrogen blowdown was significantly superior to the other macro techniques; however, its extreme slowness gave K-D the highest Figure of Merit. With methylene chloride as the solvent, nitrogen blowdown with a column was the superior technique.