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Title: Portable electronic nose based on carbon nanotube-SnO2 gas sensors and its application for detection of methanol contamination in whiskeys
Authors: Chatchawal Wongchoosuk
Anurat Wisitsoraat
Adisorn Tuantranont
Teerakiat Kerdcharoen
Mahidol University
National Electronic and Computer Technology Center
Keywords: Engineering;Materials Science;Physics and Astronomy
Issue Date: 3-Jun-2010
Citation: Sensors and Actuators, B: Chemical. Vol.147, No.2 (2010), 392-399
Abstract: In this paper, a portable electronic nose (E-nose) based on hybrid carbon nanotube-SnO2 gas sensors is described. The hybrid gas sensors were fabricated using electron beam (E-beam) evaporation by means of powder mixing. The instrument employs feature extraction techniques including integral and primary derivative, which lead to higher classification performance as compared to the classical features (ΔR and ΔR/R0). It was shown that doping of carbon nanotube (CNT) improves the sensitivity of hybrid gas sensors, while quantity of CNT has a direct effect on the selectivity to volatile organic compounds, i.e., methanol (MeOH) and ethanol (EtOH). The real-world applications of this E-nose were also demonstrated. Based on the proposed methods, this instrument can monitor and classify 1 vol% of MeOH contamination in whiskeys. © 2010 Elsevier B.V. All rights reserved.
ISSN: 09254005
Appears in Collections:Scopus 2006-2010

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