The Need for an International Sampling Convention for Inhalable Dust in Calm Air

Details

• Personal Author:
  Harper M ; Liden G
• Description:
  In the mid-1990s, the International Organization for Standardization (ISO), the Comite Europeen de Normalisation (CEN), and the American Conference of Governmental Industrial Hygienists (ACGIH ) agreed on common definitions for health-based sampling conventions for the inhalable, thoracic, and respirable aerosol fractions.(1-3) The physiological data on the relevant knowledge of howlarge a fraction of particles (of different sizes) penetrate into and/or deposit in various compartments of the human respiratory tract particle were summarized by Soderholm. (4) These sampling conventions are plotted in Figure 1. The sampling convention for inhalable dust was based on research on mannequins equipped with breathing machines and filters that collected the aerosol aspirated through a "mouth." The experiments were carried out in wind tunnels for wind speeds in the range 1-9 m/sec, and the mannequins were rotated during the experiment.(5,6) The range of wind speeds was based on what was of interest to the mining industries. The aspiration efficiency of the rotated mannequin with respect to particle size can be called the "inhalability," but this term is not used in any of the three standards referred to above. Based on the experiments, "inhalability" was defined as direction averaged and was to be independent of wind speed in the range 1-4 m/sec. The convention was truncated at 100 µm, as the underlying experiments for larger particle sizes had turned out to be exceedingly difficult to perform. Neither the "Inhalable" curve in Figure 1, nor "Thoracic" or "Respirable" depicts the spread of the underlying data. Most data on inhalability are found within a band of +/- 0.10. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Pollutants, Occupational Dust Environmental Monitoring Inhalation Exposure Occupational Health Particulate Matter Respiratory System Safety
• Keywords:
  Aerosol-particles Air-samplers Air-samples Air-sampling Airborne-dusts Airborne-particles Dust-particles Dust-samplers Dust-sampling Dusts Inhalants Inhalation-studies Particulate-dust Particulate-sampling-methods Particulates Sampling Sampling-methods

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• ISSN:
  1545-9624
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  3
• Issue:
  10
• NIOSHTIC Number:
  nn:20030903
• Citation:
  J Occup Environ Hyg 2006 Oct; 3(10):D94-D101
• Editor(s):
  Ashley K
• Federal Fiscal Year:
  2007
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9d31013dd119c74a66ce26351c1db43a1a630ae24e32883bec134e3bff1c2886cc883cbd9354ea2969b5574a88966ffc611f7b5999fb812679f01278dfadcee5
• Download URL:
  https://stacks.cdc.gov/view/cdc/191350/cdc_191350_DS1.pdf
• File Type:
  [PDF - 841.26 KB ]