Aerosol analysis for the regional air pollution study. Final report
The design and operation of an aerosol sampling and analysis program implemented during the 1975 to 1977 St. Louis Regional Air Pollution Study is described. A network of ten samplers were operated at selected sites in the St. Louis area and the total mass and elemental composition of the collected particulates were determined. Sampling periods of 2 to 24 hours were employed. The samplers were capable of collecting aerosol particles in two distinct size ranges corresponding to fine (< 2.4 ..mu..m diameter) and coarse (> 2.4 ..mu..m diameter) particles. This unique feature allowed the separation of the particulate samples into two distinct fractions with differing chemical origins and health effects. The analysis methods were also newly developed for use in the St. Louis RAPS study. Total particulate mass was measured by a beta-particle attenuation method in which a precision of +- 5 ..mu..m/cm/sup 2/ could be obtained in a one minute measurement time. Elemental compositions of the samples were determined using an energy dispersive x-ray fluorescence method in which detectable limits of 5 ng/cm/sup 2/ or less were routinely achieved for elements ranging in atomic number from Al to Pb. The advantages of these analytical methods over more conventional techniques arise from the ability to automate the measurements. During the course of the two year study, a total of more than 35,000 individual samples were processed and a total of 28 concentrations measured for each sample.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7048190
- Report Number(s):
- LBL-6497; TRN: 81-003176
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AEROSOLS
CHEMICAL COMPOSITION
AIR POLLUTION
AEROSOL MONITORING
ABSORPTION
AIR SAMPLERS
ARSENIC
BIOLOGICAL EFFECTS
BROMINE
CALCIUM
CHROMIUM
COPPER
DATA COMPILATION
DATA PROCESSING
GALLIUM
HEALTH HAZARDS
IRON
LEAD
MANGANESE
MERCURY
NICKEL
PARTICLE SIZE
POTASSIUM
RUBIDIUM
SELENIUM
STRONTIUM
SULFUR
TITANIUM
VANADIUM
X-RAY FLUORESCENCE ANALYSIS
ZINC
ALKALI METALS
ALKALINE EARTH METALS
CHEMICAL ANALYSIS
COLLOIDS
DATA
DISPERSIONS
ELEMENTS
EQUIPMENT
HALOGENS
HAZARDS
INFORMATION
LABORATORY EQUIPMENT
METALS
MONITORING
NONDESTRUCTIVE ANALYSIS
NONMETALS
NUMERICAL DATA
POLLUTION
PROCESSING
SAMPLERS
SEMIMETALS
SIZE
SOLS
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)