Evaluation of Total and Inhalable Samplers for the Collection of Carbon Nanotube and Carbon Nanofiber Aerosols

Details

• Personal Author:
  Bertke S ; Dahm, Matthew M. ; Evans DE ; Grinshpun SA
• Description:
  A growing number of carbon nanotubes and nanofibers (CNT/F) exposure and epidemiologic studies have utilized 25- and 37-mm open-faced cassettes (OFCs) to assess the inhalable aerosol fraction. It has been previously established that the 37-mm OFC undersamples particles >20 um in diameter, but the size-selective characteristics of the 25-mm OFC have not yet been fully evaluated. This article describes an experimental study conducted to determine if the 25- and 37-mm OFCs performed with relative equivalence to a reference inhalable aerosol sampler when challenged with CNT/F particles. Side-by-side paired samples were collected within a small Venturi chamber using a 25-mm styrene OFC, 37-mm styrene OFC, 25-mm aluminum OFC, and button inhalable aerosol sampler. Three types of CNT/F materials and an Arizona road dust were used as challenge aerosols for the various sampler configurations. Repeated experiments were conducted for each sampler configuration and material. The OFC samplers operated at flow rates of 2 and 5 L/min. Results showed that the 25-mm OFC performed comparably to the button sampler when challenged with CNT/F aerosols, which was demonstrated in five of the six experimental scenarios with an average error of 21%. Overall, the results of this study indicate that the sampling efficiency of the 25- and 37-mm OFCs adequately followed the ISO/ACGIH/CEN inhalable sampling convention when challenged with CNT/F aerosols. Past exposure and epidemiologic studies that used these OFC samplers can directly compare their results to studies that have used other validated inhalable aerosol samplers. [Description provided by NIOSH]
• Subjects:
  Aerosols Aluminum Compounds Dust Environmental Exposure Epidemiology Occupational Health Particulate Matter Risk Assessment Risk Factors Safety Styrene

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• Keywords:
  Aluminum Carbon Nanofibers Carbon Nanotubes CNF CNT Dusts Exposure Levels Particle Size Risk Factors Samplers
• ISSN:
  0278-6826
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSHEFS - Division of Surveillance, Hazard Evaluations, and Field Studies ; DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  53
• Issue:
  8
• NIOSHTIC Number:
  nn:20056192
• Citation:
  Aerosol Sci Technol 2019 Aug; 53(8):958-970
• Contact Point Address:
  Matthew M. Dahm, Division of Surveillance, Hazard Evaluations, and Field Studies, National Institute for Occupational Safety and Health, 1090 Tusculum Ave, MS-R14, Cincinnati, OH 45226
• Email:
  mdahm@cdc.gov
• CAS Registry Number:
  Aluminum (CAS RN 7429-90-5) ; Carbon nanotubes (CAS RN 308068-56-6) ; Styrene (CAS RN 100-42-5)
• Federal Fiscal Year:
  2019
• NORA Priority Area:
  Manufacturing
• Performing Organization:
  University of Cincinnati
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Aerosol Science and Technology
• End Date:
  20260630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9a65f258bc01fb926bfd55b6d272c38813ace5eda0b7838b6d9a928c40ad8f17e8b8f76242d64e92cc97ea19558de90c55610ac50796004116875fe45dcb2d0b
• Download URL:
  https://stacks.cdc.gov/view/cdc/213848/cdc_213848_DS1.pdf
• File Type:
  [PDF - 1.99 MB ]