Use of isopropanol to distinguish H/sub 2/SO/sub 4/ from particulate sulfate on filters
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.
- Research Organization:
- Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Sciences Research Lab.
- OSTI ID:
- 6405918
- Report Number(s):
- PB-87-180048/XAB; EPA-600/J-84/401
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105 -- Separation Procedures
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALCOHOLS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
EMISSION
EQUIPMENT
EXTRACTION
FILTERS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
MANAGEMENT
MATERIALS RECOVERY
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION CONTROL EQUIPMENT
PROCESSING
PROPANOLS
RECOVERY
SEPARATION PROCESSES
SOLUBILITY
SOLVENT EXTRACTION
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
SULFURIC ACID
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING