A sub-ppbv-level 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 8263 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.
Author: | Jonas Pangerl, Elisabeth Moser, Max MüllerORCiD, Stefan Weigl, Simon JobstORCiD, Thomas RückORCiD, Rudolf Bierl, Frank-Michael Matysik |
---|---|
DOI: | https://doi.org/10.1016/j.pacs.2023.100473 |
ISSN: | 2213-5979 |
Parent Title (English): | Photoacoustics |
Publisher: | Elsevier |
Document Type: | Article |
Language: | English |
Year of first Publication: | 2023 |
Release Date: | 2023/05/30 |
Tag: | Acetone; Breath analysis; Photoacoustic spectroscopy; Quantum cascade laser; Spectral simulation |
Volume: | 30 |
Article Number: | 100473 |
First Page: | 1 |
Last Page: | 12 |
Note: | Corresponding author: Jonas Pangerl |
Institutes: | Fakultät Angewandte Natur- und Kulturwissenschaften |
Fakultät Angewandte Natur- und Kulturwissenschaften / Sensorik-Applikationszentrum (SappZ) | |
Begutachtungsstatus: | peer-reviewed |
OpenAccess Publikationsweg: | Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium |
Corresponding author der OTH Regensburg | |
research focus: | Sensorik |
Licence (German): | ![]() |