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A sub-ppbv-level Acetone and Ethanol Quantum Cascade Laser Based Photoacoustic Sensor – Characterization and Multi-Component Spectra Recording in Synthetic Breath
- Source :
- Photoacoustics, Vol 30, Iss , Pp 100473- (2023)
- Publication Year :
- 2023
- Publisher :
- Elsevier, 2023.
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 22135979
- Volume :
- 30
- Issue :
- 100473-
- Database :
- Directory of Open Access Journals
- Journal :
- Photoacoustics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.62f2faf0009d4b74a2a9d25fc8aeb9e9
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.pacs.2023.100473