Separtion and collection of particulate and gaseous fluorides in the atmosphere (sodium bicarbonate-coated glass tube and a particulate filter method)

Journal Article · Sun Jan 01 04:00:00 EST 1978 · Annu. Book ASTM Stand.; (United States)

OSTI ID:5640466

Reaction with sodium bicarbonate coated on the inside walls of a borosilicate glass tube serves to remove gaseous fluorides from an air stream flowing through the tube. A filter following the tube removes particulate fluorides. After elution of the fluorides from the tube with water or a buffer and from the filter with acid, the fluoride is determined by either a potentiometric method (D3269) or a semiautomated method (D3270). This method is applicable to 12-hr sampling periods collecting 2 to 500 ..mu..g of gaseous fluoride at a flow rate of approx. 141/min or about 0.2 to 50 g/m/sup 3/. Acid aerosols, aluminum, certain other metals, and phosphates are known to cause interference. For a range of fluoride concentration of 0.5 to 3.3 ..mu..gF/sup -//m/sup 3/, the precision is 0.051 ..mu..gF/sup -//m/sup 3/, and the accuracy of the method is reported as > 95% with amounts of fluoride up to approx. 40 ..mu..g for sampling periods of 15 to 150 min. (BLM)

• OSTI ID: 5640466
• 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
400102 -- Chemical & Spectral Procedures
400104 -- Spectral Procedures-- (-1987)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACCURACY
AIR POLLUTION
CHEMICAL ANALYSIS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MONITORING
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
STANDARDS