| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7142427 | Sensors and Actuators B: Chemical | 2017 | 25 Pages |
Abstract
We present a method for quantitative measurements of metal oxide semiconductor gas sensors (MOS) which is based on relaxation of surface states using temperature cycled operation (TCO). The method provides sensor response to toluene in form of a power law and a reliable quantification in the concentration range of about 10Â ppb to 10Â ppm. For the calibration of the sensor, a method is developed based on the equilibrium vapour headspace over a liquid solution of toluene and squalane yielding reliable concentrations in the range of 10Â ppb to 600Â ppm. The calibration method was shown to be stable under ambient conditions and thus to be applicable for field calibration of gas sensors.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Caroline Schultealbert, Tobias Baur, Andreas Schütze, Stefan Böttcher, Tilman Sauerwald,