23 May 2005 Tin dioxide based optical sensor for in water ppm detection of ammonia at room temperature
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Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623837
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium
Abstract
In this work, preliminary experimental results on the capability of a Metal Oxides (MOXs) based optical sensor to perform ammonia detection in water environments, at room temperature, are presented. Electro-spray pyrolisis technique has been used to deposit the SnO2 films on the distal end of standard Silica Optical Fibers (SOFs). Reflection spectra of the sensing probes have been measured in the range 1520-1620nm by using a tunable laser and an optical spectrum analyzer. Single wavelength reflectance measurements have been carried out to test the sensing performances for ammonia detection in the range 4-20 ppm. High sensitivity to the target analyte and fast response times have been observed. From the results obtained, a Limit Of Detection (LOD) as low as sub-ppm has been achieved.
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M. Pisco, M. Pisco, M. Consales, M. Consales, R. Viter, R. Viter, V. Smyntyna, V. Smyntyna, S. Campopiano, S. Campopiano, M. Giordano, M. Giordano, A. Cusano, A. Cusano, Antonello Cutolo, Antonello Cutolo, } "Tin dioxide based optical sensor for in water ppm detection of ammonia at room temperature", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623837; https://doi.org/10.1117/12.623837
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