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Original title:
ELPI VS. MPSS/APSS: PERFORMANCE ASSESSMENT WITH WELL-CHARACTERIZED AEROSOLS
Authors: Ondráček, Jakub ; Roztočil, Petr ; Nikka, M. ; Vainio, O. ; Otáhal, P. ; Fialová, E. ; Balco, L.
Document type: Papers
Conference/Event: konference Ovzduší v ČASe 2025, Hustopeče (CZ), 20251110
Year: 2025
Language: eng
Abstract: There are multiple techniques available for quantifying aerosol particle number and size. Among the most widely used instruments for obtaining high time-resolution data across the nanometer to micrometer scale are aerosol spectrometers such as Mobility Particle Size Spectrometers (MPSS) and Aerodynamic Particle Size Spectrometers (APSS). Cascade impactors remain a central tool in gravimetric analyses of atmospheric aerosols, offering the benefit of size-resolved chemical composition, though they operate with comparatively low temporal resolution. A more advanced variant is the electrical cascade impactor — in our implementation, the Electrical Low-Pressure Impactor (ELPI, Dekati). This instrument combines the conventional gravimetric collection on individual stages with an electrical measurement mode: when particles impinge on a stage, the induced current is recorded in near real time. This dual mode provides both direct mass (or deposit) sampling and instantaneous electrical signals (Eckenberger et al., 2025).\nThe ability to conduct real-time (up to ~10 Hz), size-resolved (14 stages) measurements alongside chemical composition analysis makes the ELPI approach particularly powerful. Nevertheless, converting the measured currents into meaningful physical quantities (e.g., number, volume, or mass) is nontrivial, in part due to artifacts such as particle bounce, image-charge effects, or incomplete charge transfer. These biases can depend on particle size, shape, composition, or morphology (e.g. bounce behavior under different humidity or particle types).
Keywords: ELPI; MPSS/APSS; well-characterized aerosols
Project no.: LM2023030 (CEP)
Funding provider: GA MŠk
Host item entry: SBORNÍK XXIV. výroční konference České aerosolové společnosti OVZDUŠÍ V ČASe, ISBN 978-80-908653-3-4
Note: Související webová stránka: https://hdl.handle.net/11104/0372763
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.
Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Original record: https://hdl.handle.net/11104/0372763
Permalink: http://www.nusl.cz/ntk/nusl-692787
The record appears in these collections:
Research > Institutes ASCR > Institute of Chemical Process Fundamentals
Conference materials > Papers
Authors: Ondráček, Jakub ; Roztočil, Petr ; Nikka, M. ; Vainio, O. ; Otáhal, P. ; Fialová, E. ; Balco, L.
Document type: Papers
Conference/Event: konference Ovzduší v ČASe 2025, Hustopeče (CZ), 20251110
Year: 2025
Language: eng
Abstract: There are multiple techniques available for quantifying aerosol particle number and size. Among the most widely used instruments for obtaining high time-resolution data across the nanometer to micrometer scale are aerosol spectrometers such as Mobility Particle Size Spectrometers (MPSS) and Aerodynamic Particle Size Spectrometers (APSS). Cascade impactors remain a central tool in gravimetric analyses of atmospheric aerosols, offering the benefit of size-resolved chemical composition, though they operate with comparatively low temporal resolution. A more advanced variant is the electrical cascade impactor — in our implementation, the Electrical Low-Pressure Impactor (ELPI, Dekati). This instrument combines the conventional gravimetric collection on individual stages with an electrical measurement mode: when particles impinge on a stage, the induced current is recorded in near real time. This dual mode provides both direct mass (or deposit) sampling and instantaneous electrical signals (Eckenberger et al., 2025).\nThe ability to conduct real-time (up to ~10 Hz), size-resolved (14 stages) measurements alongside chemical composition analysis makes the ELPI approach particularly powerful. Nevertheless, converting the measured currents into meaningful physical quantities (e.g., number, volume, or mass) is nontrivial, in part due to artifacts such as particle bounce, image-charge effects, or incomplete charge transfer. These biases can depend on particle size, shape, composition, or morphology (e.g. bounce behavior under different humidity or particle types).
Keywords: ELPI; MPSS/APSS; well-characterized aerosols
Project no.: LM2023030 (CEP)
Funding provider: GA MŠk
Host item entry: SBORNÍK XXIV. výroční konference České aerosolové společnosti OVZDUŠÍ V ČASe, ISBN 978-80-908653-3-4
Note: Související webová stránka: https://hdl.handle.net/11104/0372763
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.
Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Original record: https://hdl.handle.net/11104/0372763
Permalink: http://www.nusl.cz/ntk/nusl-692787
The record appears in these collections:
Research > Institutes ASCR > Institute of Chemical Process Fundamentals
Conference materials > Papers
Record created 2025-12-16, last modified 2026-01-26
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