Design of an inhalable aerosol size spectrometer

Details

• Personal Author:
  Ndonga M
• Description:
  Industrial hygienists lack the proper instruments to measure size distributions of inhalable particulate matter (0-100 microm) as defined by ACGIH/ISO/CEN. The Portable Inhalable Particle Spectrometer (PIPS) was designed to size-segregate IPM in calm-air environments - which constitute a majority of workplaces. The PIPS uses an upward air velocity to restrict particle aspiration into the device to diameters above a specified cut-size. A vertical test chamber was also designed to facilitate aerosol dispersion and experimental evaluation of the PIPS. Two PIPS tubes were tested (1.5 cm and 5 cm) at four face velocities (0.6, 1.35, 2.5 and 3.5 cm.s-1) that correspond to cut-sizes of 20, 30, 40 and 50 microm in aerodynamic diameter, respectively. The observed performance of the PIPS deviated from model estimates as face velocity or tube diameter was increased. The fluid regime present inside the chamber, due to the operating PIPS, likely influenced the measured sampling efficiency of the PIPS. [Description provided by NIOSH]
• Subjects:
  Aerosols Inhalation Exposure Manufacturing And Industrial Facilities Occupational Health Particulate Matter Safety
• Keywords:
  Aerosol Particles Aerosol Sampling Analytical Instruments Equipment Design Equipment Reliability Equipment Testing Industrial Equipment Industrial Hygiene Inhalants Nanotechnology Particle Aerodynamics Particle Size Particle Size Analysis Particle Sizers Samplers Sampling Equipment Spectroscopes

  More +
• Publisher:
  Colorado State University
• Document Type:
  Text
• Funding:
  Grant ; Cooperative Agreement
• Genre:
  Dissertation
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-66
• NIOSHTIC Number:
  nn:20047879
• Citation:
  Fort Collins, CO: Colorado State University, 2015 Mar; :1-66
• Contact Point Address:
  Mwangi Ndonga, Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado
• Federal Fiscal Year:
  2015
• NORA Priority Area:
  Agriculture, Forestry and Fishing
• Performing Organization:
  Colorado State University, Fort Collins
• Peer Reviewed:
  False
• Start Date:
  20120701
• Source Full Name:
  Design of an inhalable aerosol size spectrometer
• End Date:
  20150630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:908c9de8a4be6de11f68192f89c1a3785f778ff58f7614ea4adae2e50971efa7746c2809583c2f464778ed2f940e544b4be57c0a05809f91d88a6d8fc3380c93
• Download URL:
  https://stacks.cdc.gov/view/cdc/202830/cdc_202830_DS1.pdf
• File Type:
  [PDF - 2.42 MB ]