| 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 |
Checkout
Status |
| NTIS |
PB87-180048 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| 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. |
