Record Display for the EPA National Library Catalog

RECORD NUMBER: 279 OF 285

OLS Field Name OLS Field Data
Main Title Use of Isopropanol to Distinguish H2SO4 from Particulate Sulfate on Filters.
Author Cheney, J. L. ; Fortune, C. R. ; Turlington, C. F. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;Northrop Services, Inc., Research Triangle Park, NC.
Year Published 1984
Report Number EPA/600/J-84/401;
Stock Number PB87-180048
Additional Subjects Combustion ; Solvent extraction ; Sulfates ; Emission ; Sulfur oxides ; Filters ; Filtered particle testing ; Solubility ; Chromatographic analysis ; Materials recovery ; Reprints ; Sulfuric acid ; IPA(Anhydrous Isopropanol) extraction
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB87-180048 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 18p
Abstract
Potential interferences in the anhydrous isopropanol (a-IPA) extraction method for separating sulfuric acid from particulate sulfate on filters were investigated. The method involves separation and recovery of the acid with a-IPA, followed by aqueous extraction of the particulate. Analysis for sulfate in the separate fractions was performed by ion chromatography. The solubility of ammonium sulfate in a-IPA was measured and the effects of temperature and moisture content of the solvent on ammonium sulfate solubility were determined. Neither a small uptake of moisture by the a-IPA nor elevated temperatures up to 30 C had a significant effect on the solubility of ammonium sulfate in IPA. Ammonium sulfate was determined to be very highly insoluble in a-IPA and therefore, exposure of samples to any source of ammonia will result in low recoveries of sulfuric acid by the solvent recovery procedure.