Design and evaluation of a high-flow rate dichotomous aerosol sampler

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Environment International; (USA)

DOI:https://doi.org/10.1016/0160-4120(90)90151-U· OSTI ID:6276969

Highsmith, V R ^[1]; Weant, C G ^[2]

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1. Environmental Protection Agency, Research Triangle Park, NC (USA)
2. NSI Technology Services Corporation, Research Triangle Park, NC (USA)

Two prototype high-flow dichotomous samplers, each simultaneously collecting fine (0.0-2.5 {mu}m), coarse (2.5-10.0 {mu}m), and total (0.0-10.0 {mu}m) particle samples from a single air stream, have been designed and evaluated. A series of tests were conducted to estimate the prototype sampler collection efficiencies over a range of particle concentrations, to compare prototype sampler collection efficiencies with standard particle monitors, and to evaluate relationships between particle size and sample chemistry. No statistical differences in particle collection efficiencies were observed between the two prototype samplers or between the prototype samplers and standard PM{sub 10} and PM{sub 2.5} high volume samplers. The study's analytical results indicate that the particle-bound organic compounds are primarily associated with the fine-particle sample and that the organics associated with the coarse-particle fraction did not significantly contribute to the total sample organic composition. The prototype sampler can be constructed locally from routine sampler and machine shop components. The design minimizes the extensive resource requirements associated with low-flow dichotomous sampling and is an excellent alternative for organizations not having access to commercial low flow dichotomous instrumentation.

• OSTI ID: 6276969
• Journal Information: Environment International; (USA), Journal Name: Environment International; (USA) Vol. 16:2; ISSN 0160-4120; ISSN ENVID
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOLS
AIR POLLUTION
AIR POLLUTION MONITORING
AIR SAMPLERS
CHEMICAL REACTIONS
COLLOIDS
COMBUSTION
DESIGN
DISPERSIONS
EFFICIENCY
ENERGY SOURCES
EQUIPMENT
FABRICATION
FLOW RATE
FUELS
ORGANIC COMPOUNDS
OXIDATION
PARTICLE SIZE
PARTICLES
PARTICULATES
PERFORMANCE TESTING
POLLUTION
SAMPLERS
SAMPLING
SIZE
SOLS
TESTING
THERMOCHEMICAL PROCESSES
WOOD FUELS