Design and testing of an inhalable particle spectrometer

Details

• Personal Author:
  Anderson, Kern E. ; Leith D ; Ndonga M ; Rath J ; Volckens J ; Yalin A ; Anderson, Kern E. ; Leith D ; Ndonga M ; Rath J ; Volckens J ; Yalin A
• Description:
  Large particles (dp > 10 micrometers) exist in many atmospheres (e.g., workplaces, confined spaces, wind-blown dust). Although such particles can contribute up to 50% or more to the inhaled aerosol mass following exposure, very few instruments exist to count and size such particles in situ. Large inhalable particles deposit primarily in the oral and nasal cavities, with subsequent health effects targeting the upper respiratory system. Symptomatic health effects such as acute or chronic rhinitis, chronic pharyngitis, sinusitis, and nasal cancer occur in many industries, indicating the prevalence of exposure to these large inhalable particles. No commercially available instrument currently exists to count and size particle sizes between 30 and 100 micrometers. This presentation describes the development of a new instrument to characterize the size distribution and concentration of inhalable aerosols (from 10 to 100 micrometers in diameter) in near-real time. A virtual portable inhalable particle spectrometer (vPIPS) relies on the principles of virtual impaction and with vertical elutriation to separate large particles as a function of aerodynamic diameter. The instrument has a diameter of 118 mm and weighs 0.5 kg. A 785 nm 100 mW laser diode and Si photodiode detector provides real-time particle counts. The instrument sizes particles from 30 to 100 micrometers into 10 micrometer size bins. Experimental sampling efficiency was tested in a calm air chamber with particle sizes from 10 to 100 micrometers. The vPIPS was capable of size-selective sampling and showed good sampling efficiencies. Fluid flow and particle transport in the sampler was also evaluated using computational fluid dynamics modeling. Experimental sampling efficiencies showed good agreement with computational and analytical solutions. [Description provided by NIOSH]
• Subjects:
  Automation Manufacturing And Industrial Facilities Mining Occupational Health Safety
• Keywords:
  Aerosol Particles Aerosols Airborne Particles Analytical Instruments Detectors Equipment Design Filters Inhalants Lasers Light Waves Mathematical Models Measurement Equipment Models Optical Aids Particle Aerodynamics Particle Counters Particle Diameter Particle Size Particle Size Analysis Performance Capability Performance Tests Respiratory Irritants Samplers Signaling Systems Spectroscopes

  More +
• Publisher:
  American Association for Aerosol Research
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Abstract or Summary ; Abstract or Summary
• Place as Subject:
  Colorado ; Florida ; OSHA Region 4 ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• NIOSHTIC Number:
  nn:20047870
• Citation:
  Proceedings of the AAAR 33rd Annual Conference, October 20-24, 2014, Orlando, Florida. Mount Laurel, NJ: American Association for Aerosol Research, 2014 Oct; :6IM.1
• Federal Fiscal Year:
  2015
• Performing Organization:
  Colorado State University, Fort Collins
• Peer Reviewed:
  False
• Start Date:
  20120701
• Source Full Name:
  Proceedings of the AAAR 33rd Annual Conference, October 20-24, 2014, Orlando, Florida
• End Date:
  20150630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d0a573a47bafa8ef3d866ae936cdfac5b5b80e523c959e80a6e91e51ce8b429d3d5a8ba5710eaa713935891ee352ee6105ed267b79f64447af6840e2fc7ce223
• Download URL:
  https://stacks.cdc.gov/view/cdc/202824/cdc_202824_DS1.pdf
• File Type:
  [PDF - 2.42 MB ]