Size selective samplers for particulate monitoring in California. Final report

Technical Report · Thu Oct 01 00:00:00 EDT 1981

OSTI ID:5107344

John, W; Wall, S; Wesolowski, J J

The sampling efficiency of the Size-Selective Hi-vol has been measured with monodisperse DOP particles. The cutpoint is 15 micrometers and is insensitive to flow rate. Particle deposits on the filter rate are 3% lower near the corners than in the center. Sampling a non-uniform aerosol cloud results in non-uniformity on the filter, but reduced by a factor of three. On the basis of these tests and particle bounce tests by the authors, it is concluded that this instrument is a satisfactory 'inhalable' particle sampler. The AIHL cyclone was modified to accept cassette-mounted membrane filters and retested. The pressure drop vs. flow rate curve shows the cyclone to operate in a single flow regime from 5 to 200 L/min. Using monodisperse oleic acid particles, the 50% cutpoints at 16.7, 24 and 55 L/min are found to be 3.5, 2.5 and 1.2 micrometer, respectively. The data at 55 L/min fit the same universal curve as that at lower flow rates. Deposits on the after filter were uniform to within 5%. The cyclone has been found to perform well with the new filter holder.

• Research Organization: California Dept. of Health Services, Berkeley (USA). Air and Industrial Hygiene Lab.
• OSTI ID: 5107344
• Report Number(s): PB-82-158312
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL MONITORING
AEROSOLS
AIR POLLUTION MONITORS
CALIFORNIA
COLLOIDS
CONCENTRATORS
CYCLONE SEPARATORS
DISPERSIONS
EQUIPMENT
FEDERAL REGION IX
FILTERS
INERTIAL SEPARATORS
LABORATORY EQUIPMENT
MEASURING INSTRUMENTS
MONITORING
MONITORS
NORTH AMERICA
PARTICLES
PERFORMANCE
POLLUTION CONTROL EQUIPMENT
SAMPLERS
SAMPLING
SEPARATION EQUIPMENT
SOLS
USA