Effects of ambient parameters and cross-sensitivities from O2, CO2 and H2O on the photoacoustic detection of acetone in the UV region
- We present a sensitive UV LED photoacoustic setup for the detection of gaseous acetone and discuss its applicability towards breath analysis. We investigated the performance of the sensor for low acetone concentrations down to 0.1 parts per million (ppmV). The influences of temperature, flow, pressure, optical power and LED duty cycle on the measured signal have been examined. To gain a better understanding of the different effects on the photoacoustic signal, correlation analysis was applied and feature importance was determined using a large measured dataset. Furthermore, the cross-sensitivities towards O2, CO2 and H2O have been studied extensively. Finally, the sensor’s performance to detect acetone between 0.1–1 ppmV within gas mixtures simulating breath exhale conditions has been investigated, too. With a limit of detection (LoD) of 12.5 parts per billion (ppbV) (3σ) measured under typical breath exhale gas mixture conditions, the sensor demonstrated a high potential for the application of acetone detection in human breath analysis.
Author: | Stefan Weigl, Elisabeth Wittmann, Thomas RückORCiD, Rudolf Bierl, Frank-Michael Matysik |
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DOI: | https://doi.org/10.1016/j.snb.2020.129001 |
ISSN: | 0925-4005 |
Parent Title (English): | Sensors Actuators B Chemical |
Publisher: | Elsevier |
Document Type: | Article |
Language: | English |
Year of first Publication: | 2021 |
Release Date: | 2021/02/10 |
Tag: | Acetone breath analysis; Acetone detection; Cross-sensitivities; High power UV LED; Photoacoustic spectroscopy |
Issue: | 328 |
Article Number: | 129001 |
Note: | Corresponding authors: Stefan Weigl, Elisabeth Wittmann, Thomas Rück, Rudolf Bierl, Frank-Michael Matysik |
Note: | Corrigendum to “Effects of ambient parameters and cross-sensitivities from O2, CO2 and H2O on the photoacoustic detection of acetone in the UV region” [Sens. Actuators B: Chem. 328 (February 2021) (2020) 129001]; https://doi.org/10.1016/j.snb.2020.129392 |
Institutes: | Fakultät Angewandte Natur- und Kulturwissenschaften |
Fakultät Angewandte Natur- und Kulturwissenschaften / Sensorik-Applikationszentrum (SappZ) | |
Begutachtungsstatus: | peer-reviewed |
research focus: | Sensorik |
OpenAccess Publikationsweg: | Hybrid Open Access - OA-Veröffentlichung in einer Subskriptionszeitschrift/-medium |
Corresponding author der OTH Regensburg | |
Licence (German): | Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International |