GS5.1 - Selective gas sensors from flames for breath analysis
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- Gas Sensors 5
- Author(s)
- A. Güntner, S. Pratsinis - Particle Technology Laboratory, ETH Zürich, Zurich (Switzerland)
- Pages
- 200 - 201
- DOI
- 10.5162/IMCS2018/GS5.1
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
Breath analysis is a challenging task for chemical sensors as single tracers need to be detected selectively down to low parts-per-billion (ppb) concentrations. Here, I will present recent achievements of flame-aerosol technology on selective sensing material design and showcase a breath study with Si-doped WO3 acetone sensors for fat burn monitoring. In specific, this sensor was tested on 20 volunteers during exercise and rest to measure their individual breath acetone concentrations in good agreement to proton transfer reaction time-of-flight mass spectrometry (PTR-TOF-MS). During exercise, this sensor revealed clearly the onset and progression of increasing breath acetone levels that indicate intensified fat metabolism, as validated by venous blood β-hydroxybutyrate (BOHB) measurements. As a result, this simple breath acetone sensor enables easy and hand-held fat burn monitoring for personalized and immediate feed-back on workout that can guide dieting as well.