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Penetration of Nanoparticles through Respirator Filter Media - FY06

NOTE: This page is archived for historical purposes and is no longer being maintained or updated.
Current Information can be found at: Penetration of Nanoparticles through NIOSH-approved Respirator Filters- FY07


  • To evaluate the filtration efficiency of different filter media against nanoparticles (3-20 nm)
Filtration efficiency chart

Applicable Standards

  • 42 CFR
  • ASTM E56
  • ISO TC 229

Key Partners

  • Minn. University - Nanoparticle penetration
  • NIOSH NTRC - Funding
  • DuPont Nanotech Consortium - Exchange of information


  • Respirator users
  • Industrial hygienists
  • Respirator manufacturers
  • Filter media manufacturers
  • Nanotechnology companies

Project Scope

  • Develop nanoparticle generation and test system
  • Evaluate the efficiency of different filter media for nanoparticles (3-20 nm)
  • Analyze particle diffusion and thermal rebound mechanisms


  • Project tasks completed and final report submitted (April, 2006)
  • Complete project proposal and submit for external peer-review


  • Results presented at the 28th CFR Review Meeting, Minneapolis,MN,2005
  • Abstract presented at the 2nd International Symposium on Nanotechnology and Occupational Health, Minneapolis, MN,2005
  • A manuscript describing the results is being written
  • Final report from the University of Minnesota
  • Study and preliminary results have been described in four trade journals (AIHA Synergist, Occupational Hazards, Bureau of National Affairs and Chemical & Engineering News)


  • NIOSH guidelines for respiratory protection against nanoparticles
  • ASTM and ISO guidelines and standards for handling unbound nanoparticles
Page last modified: July 23, 2007
Page last reviewed: July 23, 2007 (archived document)
Content Source: National Institute for Occupational Safety and Health (NIOSH)