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Proceedings Paper

Detection of volatile organic compounds through a sensing film of TiO2 doped with organic dyes deposited on an optical fiber
Author(s): S. Muñoz A.; J. Ramos M.; C. Martínez H.; J. Castillo M.; G. Beltrán P.; R. Palomino M.
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Paper Abstract

The necessity of detection and recognition of different types of gases, such as volatile organic compounds, which are frequently found in food and beverage industries among others, requires the development of different types of sensors. In this work, an application of optical fiber for the detection of volatile organic compounds, particularly ethanol is presented. The sensor was constructed removing a portion of the cladding and depositing instead a sensing titanium dioxide (TiO2) film doped with an organic dye (rhodamine 6G) by the sol-gel method. The sensor response was measured in a Teflon chamber where the sample to be measured was injected. A He-Ne laser beam was coupled to the fiber and the variation in the output power was measured which indicates the gas presence. The difference between the output power with and without gas gives a measure of the concentration that exists in the chamber. The experimental results showed that for an ethanol concentration range from 0 to 10500 ppm, the response of the sensor was approximately linear with a correlation coefficient of 0.9924.

Paper Details

Date Published: 16 May 2007
PDF: 6 pages
Proc. SPIE 6422, Sixth Symposium Optics in Industry, 64220E (16 May 2007); doi: 10.1117/12.742349
Show Author Affiliations
S. Muñoz A., Benemérita Univ. Autónoma de Puebla (Mexico)
J. Ramos M., Benemérita Univ. Autónoma de Puebla (Mexico)
C. Martínez H., Benemérita Univ. Autónoma de Puebla (Mexico)
J. Castillo M., Benemérita Univ. Autónoma de Puebla (Mexico)
G. Beltrán P., Benemérita Univ. Autónoma de Puebla (Mexico)
R. Palomino M., Benemérita Univ. Autónoma de Puebla (Mexico)

Published in SPIE Proceedings Vol. 6422:
Sixth Symposium Optics in Industry
Julio C. Gutiérrez-Vega; Josué Dávila-Rodríguez; Carlos López-Mariscal, Editor(s)

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