Journal
SENSORS
Volume 19, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/s19122719
Keywords
breath analysis; millimeter-wave; terahertz; spectroscopy; molecular spectroscopy; gas sensing
Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [SPP 1857, 272356870]
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Breath gas analysis is a promising tool for medical research and diagnosis. A particularly powerful technological approach is millimeter-wave/terahertz (mmW/THz) spectroscopy, because it is a very sensitive and highly selective technique. In addition, it offers the potential for compact and affordable sensing systems for wide use. In this work, we demonstrate the capability of a mmW/THz spectrometer for breath analysis. Samples from three volunteers and a sample from ambient air were analyzed with respect to 31 different molecular species. High-resolution absorption spectra were measured by scanning two absorption lines from each species. Out of the 31, a total of 21 species were detected. The results demonstrate the potential of mmW/THz spectroscopy for breath analysis.
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