Highly Specific and Wide Range NO2 sensor with color readout

We present a simple and inexpensive method to implement a Griess-Saltzman-type reaction that combines the advantages of the liquid phase method (high specificity and fast response time) with the benefits of a solid implementation (easy to handle). We demonstrate that the measurements can be carried...

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Bibliographic Details
Published in:ACS sensors 2017-10
Main Authors: Fàbrega Gallego, Cristian, Fernández Romero, Luis, Monereo Cuscó, Oriol, Pons Balagué, Alba, Xuriguera Martín, María Elena, Casals Guillén, Olga, Waag, Andreas, Prades García, Juan Daniel
Format: Article
Language:English
Subjects:
Colorimetria
Colorimetry
Medi ambient
Natural environment
Online Access:Get full text
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Summary:We present a simple and inexpensive method to implement a Griess-Saltzman-type reaction that combines the advantages of the liquid phase method (high specificity and fast response time) with the benefits of a solid implementation (easy to handle). We demonstrate that the measurements can be carried out using conventional RGB sensors; circumventing all the limitations around the measurement of the samples with spectrometers. We also present a method to optimize the measurement protocol and target a specific range of NO2 concentrations. We demonstrate that it is possible to measure the concentration of NO2 from 50 ppb to 300 ppm with high specificity and without modifying the Griess-Saltzman reagent.
ISSN:2379-3694
2379-3694