Aspiration Efficiency of IOM-Like Personal Aerosol Samplers from Experiments with a New Rapid Data Acquisition System

Details

• Personal Author:
  Brixey LA ; Vincent JH
• Description:
  New automated instrumentation for the rapid acquisition of aerosol sampler aspiration efficiency data has been applied to an investigation of a range of personal aerosol samplers of the type developed during the 1980s at the Institute of Occupational Medicine (IOM) in Edinburgh, Scotland, U.K. The experimental research was carried out in a small wind tunnel, and the relation of the results for IOM-like samplers to full-scale life-size personal aerosol sampling scenarios-like those encountered in occupational aerosol exposure assessment-was investigated by reference to the scaling laws that have been developed based on familiar aerosol mechanics as they apply to the physics of aerosol sampling. In the small-scale experimental study, the IOM-like sampler was mounted centrally on a rectangular bluff body, simulating the wearing of the sampler on the body (e.g., as by a worker in an industrial setting). Scaling with respect to the corresponding, more-realistic full-scale system for a corresponding full-scale windspeed of 1.0 m/s was achieved by varying the inlet diameter, the windspeed and the sampling flowrate. The results for windspeeds in the scaled experiments of 1.5 m/s and lower were found to differ significantly from those for windspeeds of 2.0 m/s and higher. In particular, the measured aspiration efficiency values for the lower windspeeds were markedly higher than-and clearly not consistent with-the higher windspeed group of results. It is considered likely that such divergence may be associated with a characteristic of the small wind tunnel in which the experiments were conducted. However, the scaling laws developed were found to work well for windspeeds in the scaled experiments of 1.5 m/s and higher. The results confirm that the performance of the IOM personal inhalable aerosol sampler is in quite good general agreement with the inhalability criterion. [Description provided by NIOSH]
• Subjects:
  Aerosols Occupational Exposure Occupational Health Safety
• Keywords:
  Aerosol-particles Aerosol-sampling Models Occupational-exposure Samplers Sampling Sampling-methods
• ISSN:
  0278-6826
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Michigan ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  39
• Issue:
  12
• NIOSHTIC Number:
  nn:20029586
• Citation:
  Aerosol Sci Technol 2005 Dec; 39(12):1164-1173
• Federal Fiscal Year:
  2006
• NORA Priority Area:
  Research Tools and Approaches: Exposure Assessment Methods
• Performing Organization:
  University of Michigan, Ann Arbor, Michigan
• Peer Reviewed:
  True
• Start Date:
  19940901
• Source Full Name:
  Aerosol Science and Technology
• End Date:
  20090831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:45cc27b6fb64b6e2a3f4de88e2346797a0e354bbe001bf17865fd7bb5e686e7f67eea0ace887c2377fb24621adaf084feee96fd50cc87473fe3de4dca5c537b9
• Download URL:
  https://stacks.cdc.gov/view/cdc/190535/cdc_190535_DS1.pdf
• File Type:
  [PDF - 763.05 KB ]