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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F16%3A00458521" target="_blank" >RIV/67985858:_____/16:00458521 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.5194/amt-9-1545-2016" target="_blank" >http://dx.doi.org/10.5194/amt-9-1545-2016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/amt-9-1545-2016" target="_blank" >10.5194/amt-9-1545-2016</a>

Result language

angličtina

Original language name

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

Original language description

In 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 ofnindividual 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 thenconversion 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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Atmospheric Measurement Techniques

ISSN

1867-1381

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

7

Pages from-to

1545-1551

UT code for WoS article

000375616100009

EID of the result in the Scopus database

2-s2.0-84964777724