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Publisher: Basel : MDPI × Subject: spectroscopy ×

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    Analysis of Human Breath by Millimeter-Wave/Terahertz Spectroscopy
    (Basel : MDPI, 2019) Rothbart, Nick; Holz, Olaf; Koczulla, Rembert; Schmalz, Klaus; Hübers, Heinz-Wilhelm
    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. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.