Time-resolved size distributions of sub-4 micrometers particle sulfur and nitrate. Final report

Technical Report · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5674843

Allen, D T

Size-segregated atmospheric aerosol was collected at Claremont, California during the 1987 Southern California Air Quality Study (SCAQS) using low-pressure impactors. The single-orifice impactors separated the aerosol into eight size fractions, ranging in aerodynamic diameter from 0.05 micrometer to greater than 4 micrometers. The size fractions were analyzed for sulfur using a flash volatilization-flame photometric method, for nitrate using ion chromatography, and for nitrate, carbonyl, and aliphatic carbon using infrared spectroscopy. These measurements of aerosol composition were coordinated with experiments conducted by other CRC-APRAC contractors. The other contractors measured ambient visibility and the changes in particle size associated with changes in humidity. The data collected in these experiments will be a rigorous test of current visibility models and will help to guide future work in atmospheric visibility modeling.

• Research Organization: California Univ., Los Angeles, CA (USA). Dept. of Chemical Engineering
• OSTI ID: 5674843
• Report Number(s): PB-89-209670/XAB
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION MONITORING
AIR QUALITY
CALIFORNIA
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COLLOIDS
DESIGN
DISPERSIONS
DOCUMENT TYPES
ELEMENTS
ENVIRONMENTAL QUALITY
EQUIPMENT
FEDERAL REGION IX
FLAME PHOTOMETRY
FLASH HEATING
FORECASTING
HEATING
NITRATES
NITROGEN COMPOUNDS
NONMETALS
NORTH AMERICA
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLE SIZE CLASSIFIERS
PARTICLES
PARTICULATES
PHOTOMETRY
PROGRESS REPORT
SEPARATION PROCESSES
SIZE
SOLS
SULFUR
USA
VISIBILITY