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High-performance gas sensing of CO: comparative tests for semiconducting (SnO2-based) and for amperometric gas sensors

Authors :
Barsan, N.
Stetter, J.R.
Findlay, M., Jr.
Gopel, W.
Source :
Analytical Chemistry. July 1, 1999, Vol. 71 Issue 13, p2512, 6 p.
Publication Year :
1999

Abstract

A comparison of the stability and sensitivity for two different sensor types (semiconductor Sn[O.sub.2] devices, amperometric electrochemical sensors) has been performed. Sensitivities and drifts in the signal and in the background for various concentrations of CO have been studied for thick-film Sn[O.sub.2] sensors (Pt and Pd doped) for a period in excess of 8 months. Similar performance data have been recorded for commercial amperometric sensors for a period in excess of 4 years. The two different sensor types investigated here were also compared to the well-known commercial Figaro TGS 822 sensor at similar concentrations. An objective approach for comparing different types of sensors has been developed using the 'analytical sensitivity'.

Details

ISSN :
00032700
Volume :
71
Issue :
13
Database :
Gale General OneFile
Journal :
Analytical Chemistry
Publication Type :
Academic Journal
Accession number :
edsgcl.55267739