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Extending traceability in airborne particle size distribution measurements beyond 10 µm : Counting efficiency and unit-to-unit variability of four aerodynamic particle size spectrometers

Vasilatou, Konstantina ; Wälchli, Christian ; Iida, Kenjiro ; Horender, Stefan ; Tritscher, Torsten ; Hammer, Tobias LU ; Rissler, Jenny LU ; Gaie-Levrel, François and Auderset, Kevin (2022) In Aerosol Science and Technology 57(1). p.24-34
Abstract

The aim of this study was to establish traceable number concentration measurements of airborne particles beyond 10 μm in particle size. To this end, the primary standards for particle number concentration at the National Metrology Institutes of Switzerland and Japan were further developed to extend their measurement capabilities. Details on the upgraded setup are provided. An inter-comparison of the two primary standards using an optical particle counter as transfer standard showed that these agree well within the stated uncertainties at polystyrene (PS) equivalent optical diameter of 15 µm. Subsequently, four Model 3321 (TSI Inc., USA) aerodynamic particle size spectrometers (APS) were calibrated against the primary standard of... (More)

The aim of this study was to establish traceable number concentration measurements of airborne particles beyond 10 μm in particle size. To this end, the primary standards for particle number concentration at the National Metrology Institutes of Switzerland and Japan were further developed to extend their measurement capabilities. Details on the upgraded setup are provided. An inter-comparison of the two primary standards using an optical particle counter as transfer standard showed that these agree well within the stated uncertainties at polystyrene (PS) equivalent optical diameter of 15 µm. Subsequently, four Model 3321 (TSI Inc., USA) aerodynamic particle size spectrometers (APS) were calibrated against the primary standard of Switzerland using size-certified PS spheres with optical/aerodynamic diameter up to 20 µm as test aerosols. The counting efficiency profile and unit-to-unit variability of the APS units were determined. The results presented here can be useful for the analysis and interpretation of data collected by the different atmospheric aerosol networks worldwide. The outlined methodology can also be applied in the calibration of automated bio-aerosol monitors.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Jason Olfert
in
Aerosol Science and Technology
volume
57
issue
1
pages
24 - 34
publisher
Taylor & Francis
external identifiers
  • scopus:85142268996
ISSN
0278-6826
DOI
10.1080/02786826.2022.2139659
language
English
LU publication?
yes
id
b03ca89c-f29e-47eb-b04a-d82196a2a300
date added to LUP
2023-01-13 14:29:19
date last changed
2023-11-21 15:40:44
@article{b03ca89c-f29e-47eb-b04a-d82196a2a300,
  abstract     = {{<p>The aim of this study was to establish traceable number concentration measurements of airborne particles beyond 10 μm in particle size. To this end, the primary standards for particle number concentration at the National Metrology Institutes of Switzerland and Japan were further developed to extend their measurement capabilities. Details on the upgraded setup are provided. An inter-comparison of the two primary standards using an optical particle counter as transfer standard showed that these agree well within the stated uncertainties at polystyrene (PS) equivalent optical diameter of 15 µm. Subsequently, four Model 3321 (TSI Inc., USA) aerodynamic particle size spectrometers (APS) were calibrated against the primary standard of Switzerland using size-certified PS spheres with optical/aerodynamic diameter up to 20 µm as test aerosols. The counting efficiency profile and unit-to-unit variability of the APS units were determined. The results presented here can be useful for the analysis and interpretation of data collected by the different atmospheric aerosol networks worldwide. The outlined methodology can also be applied in the calibration of automated bio-aerosol monitors.</p>}},
  author       = {{Vasilatou, Konstantina and Wälchli, Christian and Iida, Kenjiro and Horender, Stefan and Tritscher, Torsten and Hammer, Tobias and Rissler, Jenny and Gaie-Levrel, François and Auderset, Kevin}},
  issn         = {{0278-6826}},
  keywords     = {{Jason Olfert}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{24--34}},
  publisher    = {{Taylor & Francis}},
  series       = {{Aerosol Science and Technology}},
  title        = {{Extending traceability in airborne particle size distribution measurements beyond 10 µm : Counting efficiency and unit-to-unit variability of four aerodynamic particle size spectrometers}},
  url          = {{http://dx.doi.org/10.1080/02786826.2022.2139659}},
  doi          = {{10.1080/02786826.2022.2139659}},
  volume       = {{57}},
  year         = {{2022}},
}