Evaluation of a Portable Aerosol Collector and Spectrometer to Measure Particle Concentration by Composition and Size

Details

• Personal Author:
  Cai C ; Peate DW ; Peters TM ; Stebounova LV
• Description:
  We evaluated a newly developed Portable Aerosol Collector and Spectrometer (PACS) in the laboratory. We developed an algorithm to estimate mass concentration by size and composition with a PACS. In laboratory experiments, we compared particle size distributions measured with the PACS to research instruments for multi-modal aerosols: two-mode generated by spark discharge, consisting of ultrafine (fresh Mn fume) and fine particles (aged Cu fume); and three-mode produced by adding coarse particles (Arizona road dust) to the two-mode. Near-real-time size distributions from the PACS compared favorably to those from a scanning mobility particle sizer and an aerodynamic particle sizer for the three-mode aerosol (number, bias = 9.4% and R2 = 0.96; surface area, bias = 17.8%, R2 = 0.77; mass, bias = -2.2%, R2 = 0.94), but less so for the two-mode aerosol (number, bias = -17.7% and R2 = 0.51; surface area, bias = -45.5%, R2 = 0; for mass, bias = -81.75%, R2 = 0.08). Elemental mass concentrations by size were similar to those measured with a nano micro-orifice uniform deposition impactor for coarse-mode particles, whereas agreement was considerably poorer for ultrafine- and fine-mode particles. The PACS has merit in estimating multi-metric concentrations by size and composition but requires further research to resolve discrepancies identified for two-mode aerosol. [Description provided by NIOSH]
• Subjects:
  Aerosols Occupational Health Safety Spectrum Analysis
• Keywords:
  Aerosol Sampling Mobile Equipment Particle Size Analysis Sampling Equipment Spectrographic Analysis
• ISSN:
  0278-6826
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; Oklahoma ; OSHA Region 6 ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  53
• Issue:
  6
• NIOSHTIC Number:
  nn:20068568
• Citation:
  Aerosol Sci Technol 2019 Jun; 53(6):675-687
• Contact Point Address:
  Thomas M. Peters, Department of Occupational and Environmental Health, The University of Iowa, Iowa City, Iowa, USA
• Email:
  Thomas-m-peters@uiowa.edu
• Federal Fiscal Year:
  2019
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Aerosol Science and Technology
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:77f09cbfc08e07237218eb3772d35494db2fe1ad5f381ab6b851238dee792976afe82ea6ac1dfd6e2f0ddbb1be05c7b0127c3530d4bd9abfc9be12d560c487af
• Download URL:
  https://stacks.cdc.gov/view/cdc/207176/cdc_207176_DS1.pdf
• File Type:
  [PDF - 2.42 MB ]