Autor: |
Jonas Pangerl, Pritam Sukul, Thomas Rück, Patricia Fuchs, Stefan Weigl, Wolfram Miekisch, Rudolf Bierl, Frank-Michael Matysik |
Jazyk: |
angličtina |
Rok vydání: |
2024 |
Předmět: |
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Zdroj: |
Photoacoustics, Vol 38, Iss , Pp 100604- (2024) |
Druh dokumentu: |
article |
ISSN: |
2213-5979 |
DOI: |
10.1016/j.pacs.2024.100604 |
Popis: |
In this research we present a low-cost system for breath acetone analysis based on UV-LED photoacoustic spectroscopy. We considered the end-tidal phase of exhalation, which represents the systemic concentrations of volatile organic compounds (VOCs) – providing clinically relevant information about the human health. This is achieved via the development of a CO2-triggered breath sampling system, which collected alveolar breath over several minutes in sterile and inert containers. A real-time mass spectrometer is coupled to serve as a reference device for calibration measurements and subsequent breath analysis. The new sensor system provided a 3σ detection limit of 8.3 ppbV and an NNEA of 1.4E-9 Wcm−1Hz−0.5. In terms of the performed breath analysis measurements, 12 out of 13 fell within the error margin of the photoacoustic measurement system, demonstrating the reliability of the measurements in the field. |
Databáze: |
Directory of Open Access Journals |
Externí odkaz: |
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