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A Highly Sensitive Acetone and Ethanol Quantum Cascade Laser Based Photoacoustic Sensor: Characterization and Multi-Component Spectra Recording in Synthetic Breath

  • Trace gas analysis in breath is challenging due to the vast number of different components. We present a highly sensitive quantum cascade laser based photoacoustic setup for breath analysis. Scanning the range between 8260 and 8270 nm with a spectral resolution of 48 pm, we are able to quantify acetone and ethanol within a typical breath matrix containing water and CO2. We photoacoustically acquired spectra within this region of mid-infra-red light and prove that those spectra do not suffer from non-spectral interferences. The purely additive behavior of a breath sample spectrum was verified by comparing it with the independently acquired single component spectra using Pearson and Spearman correlation coefficients. A previously presented simulation approach is improved and an error attribution study is presented. With a 3σ detection limit of 6.5 ppbV in terms of ethanol and 250 pptV regarding acetone, our system is among the best performing presented so far.
Metadaten
Author:Jonas Pangerl, Elisabeth Moser, Max MüllerORCiD, Stefan Weigl, Simon JobstORCiD, Thomas RückORCiD, Rudolf Bierl, Frank-Michael Matysik
DOI:https://doi.org/10.2139/ssrn.4305376
Parent Title (English):SSRN Electronic Journal
Publisher:Elsevier
Document Type:Preprint
Language:English
Year of first Publication:2022
Release Date:2023/07/21
Tag:Photoacoustic spectroscopy; acetone; breath analysis; quantum cascade laser; spectral simulation
Institutes:Fakultät Angewandte Natur- und Kulturwissenschaften
Fakultät Angewandte Natur- und Kulturwissenschaften / Sensorik-Applikationszentrum (SappZ)
research focus:Sensorik
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG