Harun, F. K. Che, Taylor, J. E., Covington, James A., 1973- and Gardner, J. W. (Julian W.), 1958-. (2009) An electronic nose employing dual-channel odour separation columns with large chemosensor arrays for advanced odour discrimination. Sensors and Actuators B: Chemical, Vol.141 (No.1). pp. 134-140. ISSN 0925-4005

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Abstract

Here we report on an improved concept for electronic noses (e-noses) that combines three large chemosensor arrays (300 resistive elements per array) with two micro-packages, each containing a column inspired by our study of the human olfactory mucosa and nasal cavity. In this novel system, a sample odour passes over the first chemoresistive array giving "spatial" response data, equivalent to a traditional sensor-based e-nose. The odour is then divided evenly and passes through two further micro-packages (and thus columns) simultaneously. As the odour pulse travels along these columns chemical components within it are selectively delayed, thus the second and third array, placed after the micro-packages, provide both temporal retentive and spatial information. This combination of a front-end sensor array with back-end second and third arrays, coupled with appropriate pattern analysis algorithms, is shown to enhance significantly the system's ability to discriminate between complex odours. The columns were coated with non-polar and polar compounds to maximise the discrimination ability of the system. We believe that this combination of an initial sensor array, creating spatial data with the spatio-temporal data from the second array significantly enhances the ability of e-noses to discriminate complex odours.

Item Type:	Journal Article
Subjects:	Q Science > QP Physiology T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Olfactometry, Odors, Chemical detectors
Journal or Publication Title:	Sensors and Actuators B: Chemical
Publisher:	Elsevier Science S.A.
ISSN:	0925-4005
Date:	18 August 2009
Volume:	Vol.141
Number:	No.1
Number of Pages:	7
Page Range:	pp. 134-140
Identification Number:	10.1016/j.snb.2009.05.036
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/17434

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