Emission measurements with gravimetric impactors and electrical devices: An aerosol instrument comparison

Laura Salo, Fanni Mylläri, Marek Maasikmets, Ville Niemelä, Alar Konist, Keio Vainumäe, Hanna Lii Kupri, Riina Titova, Pauli Simonen, Minna Aurela, Matthew Bloss, Jorma Keskinen, Hilkka Timonen, Topi Rönkkö

Tutkimustuotos: ArtikkeliScientificvertaisarvioitu

4 Sitaatiot (Scopus)
15 Lataukset (Pure)

Abstrakti

Particulate matter in the atmosphere is known to affect Earth’s climate and to be harmful to human health. Accurately measuring particles from emission sources is important, as the results are used to inform policies and climate models. This study compares the results of two ELPI + devices, two PM10 cascade impactors and an eFilter, in combustion emission measurements. The comparison of the instruments in a realistic setting shows what types of challenges arise from measuring an emission aerosol with unknown particle morphologies and densities, different particle concentrations and high temperature. Our results show that the PM10 cascade impactors have very good intercorrelation when the collected mass is greater than 150 µg, but below that, the uncertainty of the results increases with decreasing mass. The raw signals of two ELPI + devices were nearly identical in most samples, as well as the particle number concentrations and size distributions calculated from raw signals; however, transforming the current distributions into mass distributions showed variation in the mass concentration of particles larger than 1 µm. The real-time time signal measured by eFilter was similar to the total current measured by ELPI+. The eFilter and PM10 cascade impactors showed similar particle mass concentrations, whereas ELPI + showed clearly higher ones in most cases. We concluded that the difference is at least partially due to volatile components being measured by ELPI+, but not by the mass collection measurements.

AlkuperäiskieliEnglanti
Sivut526-539
Sivumäärä14
JulkaisuAerosol Science and Technology
Vuosikerta53
Numero5
DOI - pysyväislinkit
TilaJulkaistu - 1 maalisk. 2019
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Julkaisufoorumi-taso

  • Jufo-taso 1

!!ASJC Scopus subject areas

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

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