Tentative test method for sulfur dioxide content of the atmosphere (West-Gaeke method)

Journal Article · Wed Jan 01 04:00:00 EST 1975 · Annu. Book ASTM Stand.; (United States)

OSTI ID:7212149

This method covers the colorimetric determination of concentrations of 0.003 to 5.0 ppM of sulfur dioxide (SO/sub 2/) in the atmosphere. The method is selective, sensitive, reproducible, and suitable for field use. It is based on the Schiff Reaction. The effects of the principal known interferences of oxides of nitrogen, ozone, and heavy metals (for example, iron, manganese, and chromium) have been minimized or eliminated. The lower limit of detection of sulfur dioxide in 10 ml of potassium or sodium tetrachloromercurate is 0.3 ..mu..l (based on twice the standard deviation) representing a concentration of 0.01 ppM (26 ..mu..g/m/sup 3/) of SO/sub 2/ in an air sample of 30 liters. Beer's law is followed through the working range from 0.005 to 1.0 absorbance units (0.2 to 35.0 ..mu..g in 25 ml of final solution). One cannot extrapolate beyond these ranges by changing volumes of atmosphere sampled, unless the absorption efficiency of the particular system is known or determined at the volumes and concentrations under study.

• OSTI ID: 7212149
• 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

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
AIR
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
FLUIDS
GASES
OXIDES
OXYGEN COMPOUNDS
SENSITIVITY
SPECTROSCOPY
STANDARDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES