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Identification and quantification of different vapours using a single polymer chemoresistor and the novel dual transient temperature modulation technique
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Iwaki, Takao, Covington, James A., 1973-, Udrea, Florin and Gardner, J. W. (Julian W.), 1958-. (2009) Identification and quantification of different vapours using a single polymer chemoresistor and the novel dual transient temperature modulation technique. Sensors and Actuators B: Chemical, Vol.141 (No.2). pp. 370-380. ISSN 0925-4005
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Official URL: http://dx.doi.org/10.1016/j.snb.2009.06.050
Abstract
This paper presents a novel signal processing technique for a square wave temperature modulated carbon black/polymer composite sensor. The technique consists of only two mathematical operations: summing the off-and on-transients of the conductance signals, and subtracting the steady-state conductance signal. The technique has been verified through its application to a carbon black/polyvinylpyrrolidone composite chemoresistor. Identification of water, methanol and ethanol vapours was successfully demonstrated using the peak time of the resultant curves. Furthermore, quantification of those vapours was found to be possible using the height of the peak heights, which was linearly proportional to concentration. The technique does not require zero-gas calibration and thus is superior to previously reported techniques.
| Item Type: | Journal Article |
|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TP Chemical technology |
| Divisions: | Faculty of Science > Engineering |
| Library of Congress Subject Headings (LCSH): | Vapors -- Identification, Gas detectors, Carbon-black, Signal processing -- Technique, Pollutants |
| Journal or Publication Title: | Sensors and Actuators B: Chemical |
| Publisher: | Elsevier Science SA |
| ISSN: | 0925-4005 |
| Official Date: | 7 September 2009 |
| Volume: | Vol.141 |
| Number: | No.2 |
| Number of Pages: | 11 |
| Page Range: | pp. 370-380 |
| Identification Number: | 10.1016/j.snb.2009.06.050 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/17191 |
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