Record Display for the EPA National Library Catalog


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
Library Call Number Additional Info Location Last
NTIS  PB87-180048 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 18p
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.