Weigl, Stefan and Wittmann, Elisabeth and Rueck, Thomas and Bierl, Rudolf and Matysik, Frank-Michael (2021) Effects of ambient parameters and cross-sensitivities from O-2, CO2 and H2O on the photoacoustic detection of acetone in the UV region. SENSORS AND ACTUATORS B-CHEMICAL, 328: 129001. ISSN 0925-4005
Full text not available from this repository. (Request a copy)Abstract
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 O-2, 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) (3 sigma) measured under typical breath exhale gas mixture conditions, the sensor demonstrated a high potential for the application of acetone detection in human breath analysis.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | WATER-VAPOR; ABSORPTION-SPECTRA; NO2; SPECTROSCOPY; QEPAS; TIME; Acetone detection; Photoacoustic spectroscopy; High power UV LED; Cross-sensitivities; Acetone breath analysis |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Instrumentelle Analytik (Prof. Frank-Michael Matysik) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Aug 2022 10:29 |
| Last Modified: | 10 Aug 2022 10:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/46403 |
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