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|Colorimetric sensor for bad odor detection using automated color correction
Benito Altamirano, Ismael
Casals Guillén, Olga
Romano Rodríguez, Albert
Prades García, Juan Daniel
|Colorimetric sensors based on color-changing dyes offer a convenient approach for the quantitative measurement of gases. An integrated, mobile colorimetric sensor can be particularly helpful for occasional gas measurements, such as informal air quality checks for bad odors. In these situations, the main requirement is high availability, easy usage, and high specificity towards one single chemical compound, combined with cost-efficient production. In this contribution, we show how a well stablished colorimetric method can be adapted for easy operation and readout, making it suitable for the untrained end user. As an example, we present the use of pH indicators for the selective and reversible detection of NH3 in air (one relevant gas contributing to bad odors) using gas-sensitive layers dip coated on glass substrates. Our results show that the method can be adapted to detect NH3 concentrations lower than 1 ppm, with measure-to-result times in the range of a few minutes. We demonstrate that the color measurements can be carried out with the optical signals of RGB sensors, without losing quantitative performance.
|Reproducció del document publicat a: http://dx.doi.org/10.1117/12.2265990
|It is part of:
|Proceedings Smart Sensors, Actuators, and MEMS VIII, 2017, vol. 10246, num. 102461F
Comunicació presentada a: SPIE Microtechnologies. Advances in nanotechnology and microtechnology systems applications. May 8 to 10, 2017. Barcelona, Spain
|Appears in Collections:
|Comunicacions a congressos (Enginyeria Electrònica i Biomèdica)
Publicacions de projectes de recerca finançats per la UE
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