6.3.4 Noble Metal Added Tin Oxide VOC Sensors as Nonanal Detection for Exhaled Breath Air Monitoring
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 6.3 Metal Oxide-based Gas Sensors VI
- Author(s)
- T. Itoh, T. Nakashima, N. Izu, W. Shin - National Institute of Advanced Industrial Science and Technology (AIST) (Japan), Y. Setoguchi, K. Kato, M. Toyota - Figaro Engineering Inc. (Japan)
- Pages
- 547 - 550
- DOI
- 10.5162/IMCS2012/6.3.4
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
We have investigated the VOCs-sensing properties of Pt, Pd, Au-loaded SnO2 thick film for exhaled breath air. It has been reported that breaths of lung cancer patients include long methylene chain-aldehydes, such as nonanal. The Pt, Pd, Au-loading for SnO2 type gas sensors is advantage for detect to low concentration VOCs. The Pt,Pd,Au/SnO2 element shows higher response to nonanal than a non-loaded SnO2 element. The combustion of nonanal molecules on the surface of SnO2 grains is assisted by added noble metals. A nonanal-sensing property of the The Pt,Pd,Au/SnO2 depend on an annealing temperature. We installed the sensor element to a prototype of breath monitor with gas-chromatograph system, and analyzed mixed gas including three long methylene chainaldehyde gases.