Tentative test method for sulfur dioxide in workplace atmospheres (barium perchlorate method)
Journal Article
·
· Annu. Book ASTM Stand.; (United States)
OSTI ID:7295207
This method is used to determine sulfur dioxide in workplace atmospheres. It is specific for SO/sub 2/ if precautions are taken to remove interfering particules and mists. Special care must be given to training analysts to determine the end point. The method is sensitive to 0.1 mg of sulfur dioxide/m/sup 3/ in a 100-liter air sample, or about 0.25 ppM SO/sub 2/ in air. The upper limit is the amount of SO/sub 2/ absorbed in the hydrogen peroxide reagent and is at least 5 mg. This method is less sensitive than the one by West-Gaeke for ambient air and can be more difficult to operate. However, this method has ample sensitivity for workplace atmosphere concentrations of SO/sub 2/ and with a minimum of operator training, the analysis can be rapid and simple. A known volume of air is drawn through a midget impinger containing 15 ml of 0.3 N hydrogen peroxide. The sulfur dioxide present is oxidized to sulfate and then titrated with 0.005 M barium perchlorate using thorin as the indicator. There is a change from yellow to pink at the end point.
- OSTI ID:
- 7295207
- Journal Information:
- Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 26; ISSN ASTSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR
AIR POLLUTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM PERCHLORATES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHLORINE COMPOUNDS
FLUIDS
GASES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
MONITORING
OXIDES
OXYGEN COMPOUNDS
PERCHLORATES
PEROXIDES
POLLUTION
STANDARDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TITRATION
WORKING CONDITIONS
400102* -- Chemical & Spectral Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR
AIR POLLUTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM PERCHLORATES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHLORINE COMPOUNDS
FLUIDS
GASES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
MONITORING
OXIDES
OXYGEN COMPOUNDS
PERCHLORATES
PEROXIDES
POLLUTION
STANDARDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TITRATION
WORKING CONDITIONS