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Evaluation of Aerodynamic Particle Sizer and Electrical Low-Pressure Impactor for Unimodal and Bimodal Mass-Weighted Size Distributions
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design. Bioenergiteknik.
2005 (English)In: Aerosol Science and Technology, ISSN 0278-6826, Vol. 39, no 9, p. 871-887Article in journal (Refereed) Published
Abstract [en]

The objective of this study was to investigate the feasibility of the Aerodynamic Particle Sizer (APS) and the Electrical Low-Pressure Impactor (ELPI) to study mass weighted particle size distributions. Unimodal and bimodal liquid test aerosols were produced to a small chamber. Simultaneous measurements were performed with an APS 3320, an APS 3321, an ELPI and a Dekati Low-Pressure Impactor (DLPI) analyzed gravimetrically. ELPI current and mass responses were simulated for lognormal size distributions using a parameterization of the impactor kernel functions. In experiments with a single coarse mode, the mass ratio to the DLPI was between 0.75 and 1.15 for both APS models up to 5 µ m and for the ELPI up to 3 µ m. For larger sizes the ELPI and APS 3320 overestimated and the APS 3321 underestimated the concentration. In experiments with a single fine mode, submicrometer ELPI and DLPI results were in good agreement. However, in contrast to the DLPI all three spectrometers showed a significant mass fraction above 1 µ m. In experiments with a bimodal size distribution, the mass ratios were altered compared to single coarse mode experiments. Simulations showed that uncertainties in ELPI measurements of larger particles occur when concentrations of small particles are high. Several mechanisms that may bias ELPI and APS measurements are described. With knowledge of these, ELPI and APS 3321 can, under many circumstances give accurate time-resolved mass size distributions for particles smaller than 3 and 5 µm, respectively.

Place, publisher, year, edition, pages
Taylor and Francis Ltd , 2005. Vol. 39, no 9, p. 871-887
National Category
Atom and Molecular Physics and Optics Other Engineering and Technologies not elsewhere specified
Identifiers
URN: urn:nbn:se:vxu:diva-4259DOI: doi:10.1080/02786820500295677OAI: oai:DiVA.org:vxu-4259DiVA, id: diva2:204217
Available from: 2007-03-02 Created: 2007-03-02 Last updated: 2011-01-12Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
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  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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  • html
  • text
  • asciidoc
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