کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
743245 | 894348 | 2009 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Identification and quantification of different vapours using a single polymer chemoresistor and the novel dual transient temperature modulation technique Identification and quantification of different vapours using a single polymer chemoresistor and the novel dual transient temperature modulation technique](/preview/png/743245.png)
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.
Journal: Sensors and Actuators B: Chemical - Volume 141, Issue 2, 7 September 2009, Pages 370–380