Standard method of test for particulate matter in the atmosphere (optical density of filtered deposit). [Pollution and sampling]
Particulate matter in the atmosphere is determined by measurement of the light transmission or reflectance properties of the dispersed solid or liquid particles trapped on a filter paper or other white fibrous media. The atmosphere being tested is screened to remove particles greater than 40 ..mu..m in diameter prior to passage through a circular area of filter paper at a measured sampling rate for a 1-h period or longer. Simultaneous and parallel samples are collected. The optical density of the circular spots or stains is measured by reflectance or transmittance in comparison with that of a clean paper in a spectrophotometer or colorimeter using white light or preferably light of wavelength of approximately 400 nm. Sample calculations of results are included. (BLM)
- OSTI ID:
- 7343416
- 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
Similar Records
Standard recommended practice for collection by filtration and determination of mass, number, and optical sizing of atmospheric particulates
Standard method for sampling stacks for particulate matter
Related Subjects
400102* -- Chemical & Spectral Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR
AIR FILTERS
AIR POLLUTION
CHEMICAL ANALYSIS
EQUIPMENT
FILTERS
FILTRATION
FLUIDS
GASES
MONITORING
OPACITY
OPTICAL PROPERTIES
PARTICLES
PHYSICAL PROPERTIES
POLLUTION
POLLUTION CONTROL EQUIPMENT
SAMPLING
SEPARATION PROCESSES
STANDARDS