Rectangular mode of operation for detecting pesticide residue by using a single SnO2-based gas sensor
✍ Scribed by Xingjiu Huang; Jinhuai Liu; Dongliang Shao; Zongxin Pi; Zengliang Yu
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 163 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0925-4005
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✦ Synopsis
A new rapid detecting method (called dynamic measurements) was reported to detect and distinguish the presence of two pesticide gases in the ambient atmosphere. The method employed only a single SnO 2 -based gas sensor in a rectangular temperature mode to perform the qualitative analysis of a binary gas mixture (acephate and trichlorphon) in air. Experimental results showed that high selectivity of the sensor achieved in the range of 250-300 • C and modulating frequency 20 mHz, one can easily observe the qualitative difference among the response to pure acephate and trichlorphon gases of the same concentration and to the mixture.