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Colorimetric sensor for bad odor detection using automated color correction

 
: Schmitt, Katrin; Tarantik, Karina; Pannek, Carolin; Benito-Altamirano, Ismael; Casals, Olga; Fabrega, Cristian; Romano-Rodriguez, Albert; Wöllenstein, Jürgen; Prades, Juan Daniel

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Fulltext urn:nbn:de:0011-n-4614663 (1.3 MByte PDF)
MD5 Fingerprint: 3080a011b735d4cd5a6cfa7697bf8fb6
Copyright Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Created on: 19.10.2018


Fonseca, Luis (Hrsg.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Smart Sensors, Actuators, and MEMS VIII : 8-10 May 2017, Barcelona, Spain
Bellingham, WA: SPIE, 2017 (Proceedings of SPIE 10246)
ISBN: 978-1-5106-0993-8
ISBN: 978-1-5106-0994-5
Paper 102461F, 10 pp.
Conference "Smart Sensors, Actuators, and MEMS" <8, 2017, Barcelona>
English
Conference Paper, Electronic Publication
Fraunhofer IPM ()
colorimetric sensor; Ammonia Detection; Automated Color Correction; RGB

Abstract
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.

: http://publica.fraunhofer.de/documents/N-461466.html