Comparison of Methods for Converting Dylos Particle Number Concentrations to PM2.5 Mass Concentrations

Remy Franken, Thomas Maggos, Asimina Stamatelopoulou, Miranda Loh, Eelco Kuijpers, John Bartzis, Suzanne Steinle, John W. Cherrie, Anjoeka Pronk

Research output: Contribution to journalArticle

Abstract

The aim of this study was to (a) develop a method for converting particle number concentrations (PNC) obtained by Dylos to PM2.5 mass concentrations, (b) compare this conversion with similar methods available in the literature, and (c) compare Dylos PM2.5 obtained using all available conversion methods with gravimetric samples. Data were collected in multiple residences in three European countries using the Dylos and an Aerodynamic Particle Sizer (APS, TSI) in the Netherlands or an optical particle counter (OPC, GRIMM) in Greece. Two statistical fitted curves were developed based on Dylos PNC and either an APS or an OPC particle mass concentrations (PMC). In addition, at the homes of 16 volunteers (UK and Netherlands), Dylos measurements were collected along with gravimetric samples. The Dylos PNC were transformed to PMC using all the fitted curves obtained during this study (and three found in the literature) and were compared with gravimetric samples. The method developed in the present study using an OPC showed the highest correlation (Pearson (R) = 0.63, Concordance (ρ c ) = 0.61) with gravimetric data. The other methods resulted in an underestimation of PMC compared to gravimetric measurements (R = 0.65-0.55, ρ c  = 0.51-0.24). In conclusion, estimation of PM2.5 concentrations using the Dylos is acceptable for indicative purposes.

Original languageEnglish
Pages (from-to)450-459
Number of pages10
JournalIndoor Air
Volume29
Issue number3
Early online date13 Feb 2019
DOIs
Publication statusPublished - May 2019

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Radiation counters
Aerodynamics
Netherlands
Greece
Volunteers

Keywords

  • Dylos
  • aerodynamic particle sizer
  • conversion
  • mass concentration
  • optical particle counter
  • particle number concentration

ASJC Scopus subject areas

  • Environmental Engineering
  • Building and Construction
  • Public Health, Environmental and Occupational Health

Cite this

Franken, R., Maggos, T., Stamatelopoulou, A., Loh, M., Kuijpers, E., Bartzis, J., ... Pronk, A. (2019). Comparison of Methods for Converting Dylos Particle Number Concentrations to PM2.5 Mass Concentrations. Indoor Air, 29(3), 450-459. https://doi.org/10.1111/ina.12546
Franken, Remy ; Maggos, Thomas ; Stamatelopoulou, Asimina ; Loh, Miranda ; Kuijpers, Eelco ; Bartzis, John ; Steinle, Suzanne ; Cherrie, John W. ; Pronk, Anjoeka. / Comparison of Methods for Converting Dylos Particle Number Concentrations to PM2.5 Mass Concentrations. In: Indoor Air. 2019 ; Vol. 29, No. 3. pp. 450-459.
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Franken, R, Maggos, T, Stamatelopoulou, A, Loh, M, Kuijpers, E, Bartzis, J, Steinle, S, Cherrie, JW & Pronk, A 2019, 'Comparison of Methods for Converting Dylos Particle Number Concentrations to PM2.5 Mass Concentrations', Indoor Air, vol. 29, no. 3, pp. 450-459. https://doi.org/10.1111/ina.12546

Comparison of Methods for Converting Dylos Particle Number Concentrations to PM2.5 Mass Concentrations. / Franken, Remy; Maggos, Thomas; Stamatelopoulou, Asimina; Loh, Miranda; Kuijpers, Eelco; Bartzis, John; Steinle, Suzanne; Cherrie, John W.; Pronk, Anjoeka.

In: Indoor Air, Vol. 29, No. 3, 05.2019, p. 450-459.

Research output: Contribution to journalArticle

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AU - Franken, Remy

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AU - Loh, Miranda

AU - Kuijpers, Eelco

AU - Bartzis, John

AU - Steinle, Suzanne

AU - Cherrie, John W.

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N2 - The aim of this study was to (a) develop a method for converting particle number concentrations (PNC) obtained by Dylos to PM2.5 mass concentrations, (b) compare this conversion with similar methods available in the literature, and (c) compare Dylos PM2.5 obtained using all available conversion methods with gravimetric samples. Data were collected in multiple residences in three European countries using the Dylos and an Aerodynamic Particle Sizer (APS, TSI) in the Netherlands or an optical particle counter (OPC, GRIMM) in Greece. Two statistical fitted curves were developed based on Dylos PNC and either an APS or an OPC particle mass concentrations (PMC). In addition, at the homes of 16 volunteers (UK and Netherlands), Dylos measurements were collected along with gravimetric samples. The Dylos PNC were transformed to PMC using all the fitted curves obtained during this study (and three found in the literature) and were compared with gravimetric samples. The method developed in the present study using an OPC showed the highest correlation (Pearson (R) = 0.63, Concordance (ρ c ) = 0.61) with gravimetric data. The other methods resulted in an underestimation of PMC compared to gravimetric measurements (R = 0.65-0.55, ρ c  = 0.51-0.24). In conclusion, estimation of PM2.5 concentrations using the Dylos is acceptable for indicative purposes.

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Franken R, Maggos T, Stamatelopoulou A, Loh M, Kuijpers E, Bartzis J et al. Comparison of Methods for Converting Dylos Particle Number Concentrations to PM2.5 Mass Concentrations. Indoor Air. 2019 May;29(3):450-459. https://doi.org/10.1111/ina.12546