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Intercomparison of 15 Aerodynamic Particle Size Spectrometers (APS 3321): Uncertainties in Particle Sizing and Number Size Distribution.

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    SYSNO ASEP0458521
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleIntercomparison of 15 Aerodynamic Particle Size Spectrometers (APS 3321): Uncertainties in Particle Sizing and Number Size Distribution.
    Author(s) Pfeifer, S. (DE)
    Müller, T. (DE)
    Weinhold, K. (DE)
    Zíková, Naděžda (UCHP-M) RID, ORCID, SAI
    dos Santos, S.M. (IT)
    Marinoni, A. (IT)
    Bischof, O.F. (DE)
    Kykal, C. (DE)
    Ries, L. (DE)
    Meinhardt, F. (DE)
    Aalto, P. (FI)
    Mihalopoulos, N. (GR)
    Wiedensohler, A. (DE)
    Source TitleAtmospheric Measurement Techniques - ISSN 1867-1381
    Roč. 9, č. 4 (2016), s. 1545-1551
    Number of pages7 s.
    Languageeng - English
    CountryDE - Germany
    Keywordscounting efficiency ; aerodynamic particle size spectrometers ; laboratory study
    Subject RIVCF - Physical ; Theoretical Chemistry
    Institutional supportUCHP-M - RVO:67985858
    UT WOS000375616100009
    EID SCOPUS84964777724
    AnnotationIn a laboratory study within the framework of ACTRIS, 15 aerodynamic particle size spectrometers (APS model 3321, TSI Inc., St. Paul, MN, USA) were compared with a focus on flow rates, particle sizing, and the unit-tounit variability of the particle number size distribution. Flow rate deviations were relatively small (within a few percent), while the sizing accuracy was found to be within 10% compared to polystyrene latex (PSL) reference particles. The unit-to-unit variability in terms of the particle number size distribution during this study was within 10% to 20% for particles in the range of 0.9 up to 3 μm, which is acceptable for atmospheric measurements. For particles smaller than that, the variability increased up to 60 %, probably caused by differences in the counting efficiencies of
    individual units. Number size distribution data for particles smaller than 0.9 μm in aerodynamic diameter should only be used with caution. For particles larger than 3 μm, the unit-tounit variability increased as well. A possible reason is an insufficient sizing accuracy in combination with a steeply sloping particle number size distribution and the increasing uncertainty due to decreasing counting. Particularly this uncertainty of the particle number size distribution must be considered if higher moments of the size distribution such as the particle volume or mass are calculated, which require the
    conversion of the aerodynamic diameter measured to a volume equivalent diameter. In order to perform a quantitative quality assurance, a traceable reference method for the particle number concentration in the size range 0.5–3 μm is needed.
    WorkplaceInstitute of Chemical Process Fundamentals
    ContactEva Jirsová,, Tel.: 220 390 227
    Year of Publishing2017
Number of the records: 1