Evaluation of methodology and prototype to measure atmospheric sulfuric acid. Final report, June 1975--June 1976

Technical Report · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7107271

Snyder, R E; Reed, T J; McKissick, A M

A method is being developed to selectively assay ambient sulfuric acid aerosol. The method utilizes the vapor of a volatile amine (or amine derivative) to neutralize the acid as it is collected on a Teflon filter. The amine sulfate thus formed is thermally decomposed at 200C to release sulfur dioxide, or other stoichiometrically related sulfur containing adduct, which is measured by a flame photometric detector. Immediate chemical fixation of the acid lessens the chance of side reactions with other substances on the filter, while the relatively low decomposition temperature eliminates particulate interferences such as ammonium sulfate. Sulfur dioxide is also collected as a reagent complex on the filter but is selectively removed by heating at 100C.

• Research Organization: Atlantic Research Corp., Alexandria, VA (USA)
• OSTI ID: 7107271
• Report Number(s): PB-265395; ARC-49-5664
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DISPERSIONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MONITORING
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION
SOLS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID