Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 6, 2012
Previous Article Next Article

Development of low-cost ammonia gas sensors and data analysis algorithms to implement a monitoring grid of urban environmental pollutants

Author affiliations

Abstract

The present study is focused on the implementation of a novel, low cost, urban grid of nanostructured chemresistor gas sensors for ammonia concentration ([NH3]) monitoring, with NH3 being one of the main precursors of secondary fine particulate. Low-cost chemresistor gas sensors based on carbon nanotubes have been developed, their response to [NH3] in the 0.17–5.0 ppm range has been tested, and the devices have been properly calibrated under different relative humidity conditions in the 33–63% range. In order to improve the chemresistor selectivity towards [NH3], an Expert System, based on fuzzy logic and genetic algorithms, has been developed to extract the atmospheric [NH3] (with a sensitivity of a few ppb) from the output signal of a model chemresistor gas sensor exposed to an NO2, NOX and O3 gas mixture. The concentration of these pollutants that are known to be the most significant interfering compounds during ammonia detection with carbon nanotube gas sensors has been tracked by the ARPA monitoring network in the city of Milan and the historical dataset collected over one year has been used to train the Expert System.

Graphical abstract: Development of low-cost ammonia gas sensors and data analysis algorithms to implement a monitoring grid of urban environmental pollutants

Back to tab navigation

Article information


Submitted
03 Feb 2012
Accepted
15 Mar 2012
First published
15 Mar 2012

J. Environ. Monit., 2012,14, 1565-1575
Article type
Paper

Development of low-cost ammonia gas sensors and data analysis algorithms to implement a monitoring grid of urban environmental pollutants

M. Chiesa, F. Rigoni, M. Paderno, P. Borghetti, G. Gagliotti, M. Bertoni, A. Ballarin Denti, L. Schiavina, A. Goldoni and L. Sangaletti, J. Environ. Monit., 2012, 14, 1565
DOI: 10.1039/C2EM30102D

Search articles by author

Spotlight

Advertisements