Preprints
https://doi.org/10.5194/ar-2025-15
https://doi.org/10.5194/ar-2025-15
28 May 2025
 | 28 May 2025
Status: this preprint is currently under review for the journal AR.

Mass concentration intercomparison of soot generated with Mini-Cast

Benoît Sagot, Guillaume Pailloux, and Amel Kort

Abstract. This study focuses on measuring mass concentration of soot aggregates generated with a Mini-CAST burner. The experiments were performed in a test bench able to generate soot particles with different size distributions and different OC/TC ratios. With this soot production, we assessed the mass concentration measurements based on three online instruments (TEOM, PPS and MA300) and two offline concentration determination (OC/TC and SMPS), considering the gravimetric measurement as a reference. The findings demonstrate that the TEOM and the quantification based on the thermo-optical OC/TC analyser performed within acceptable limits of 10 % in comparison to the gravimetric reference measurement, over a wide range of OC/TC, mass concentration and size distribution. The Pegasor Particle Sizer (PPS) mass concentration measurement which is based on the aerosol electrical charging is calibrated for a reference size distribution, and we suggested a correction of the mass concentration measurement based on the aerosol Fuchs active surface, that proved to efficient within the limits of this study. Finally, we confirmed that the mass concentration measurements obtained with the MA300 aethalometer are OC/TC ratio and wavelength dependent, and we were able to establish OC/TC limits for the overall mass concentration evaluation with the infrared and ultraviolet wavelengths.

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Benoît Sagot, Guillaume Pailloux, and Amel Kort

Status: open (until 09 Jul 2025)

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Benoît Sagot, Guillaume Pailloux, and Amel Kort
Benoît Sagot, Guillaume Pailloux, and Amel Kort

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Short summary
The measurement of particle mass concentrations in gases is essential for monitoring emissions from engine exhaust or atmospheric pollutants. Various instruments allow for real-time concentration monitoring, but few studies have evaluated the accuracy and reliability of these measurements. We present the results of an intercomparison between several mass concentration measurement instruments to assess their ranges of validity, providing valuable guidance for future users of these devices.
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