| Autor: |
Utsunomiya, Koh, Nakagawa, Masuo, Sanari, Nobuyuki, Kohata, Masaki, Tomiyama, Tsuyoshi, Yamamoto, Isao, Wada, Tomonori, Yamashita, Nobuhiko, Yamashita, Yoshihiko |
| Zdroj: |
Sensors and Actuators B: Chemical; April 1995, Vol. 25 Issue: 1-3 p790-793, 4p |
| Abstrakt: |
A gas sensor that utilizes chemiluminescence (CL) during the catalytic oxidation of odour vapours on a sintered aluminium oxide (γ-Al2O3) layer is proposed. A new technique is applied to determine continuously the concentration of each constituent in a mixed vapour by a single CL-based sensor. The sensor is heated and cooled periodically in a temperature cycle between 200 and 740 °C at constant heating and cooling rates of ±9 °C s−1. By measuring the total CL intensities in the heating and cooling courses, we can obtain the concentration of each constituent for a mixed vapour of ethanol and acetone in air. The lowest detection limit of the concentration of these vapours is of the order of 1 ppm. |
| Databáze: |
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| Externí odkaz: |
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