Field-deployable cantilever-enhanced photoacoustic instrument for aerosol light absorption measurement at three wavelengths DOI Creative Commons
Juho Karhu, Tommi Mikkonen, Joel Kuula

et al.

Aerosol Research, Journal Year: 2025, Volume and Issue: 3(1), P. 113 - 124

Published: Feb. 28, 2025

Abstract. We demonstrate a measurement of aerosol absorption at three wavelengths for particles below 1 µm in diameter using highly sensitive photoacoustic spectrometer. The acoustic signal is detected with cantilever microphone, which allows detection without the need to apply resonance enhance signal. lack resonator makes instrument compact and well suited field measurements. A employing method was developed deployed black carbon monitoring an air quality station. shows excellent sensitivity situ measurement, limits 0.016, 0.025 0.041 Mm−1, simultaneous measurements 445, 520 638 nm, respectively, h averaging time. concentration measured new compared against filter-based photometers operating site, showing high correlation.

Language: Английский

Field-deployable cantilever-enhanced photoacoustic instrument for aerosol light absorption measurement at three wavelengths DOI Creative Commons
Juho Karhu, Tommi Mikkonen, Joel Kuula

et al.

Aerosol Research, Journal Year: 2025, Volume and Issue: 3(1), P. 113 - 124

Published: Feb. 28, 2025

Abstract. We demonstrate a measurement of aerosol absorption at three wavelengths for particles below 1 µm in diameter using highly sensitive photoacoustic spectrometer. The acoustic signal is detected with cantilever microphone, which allows detection without the need to apply resonance enhance signal. lack resonator makes instrument compact and well suited field measurements. A employing method was developed deployed black carbon monitoring an air quality station. shows excellent sensitivity situ measurement, limits 0.016, 0.025 0.041 Mm−1, simultaneous measurements 445, 520 638 nm, respectively, h averaging time. concentration measured new compared against filter-based photometers operating site, showing high correlation.

Language: Английский

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