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Proceedings Paper

Fiber optic fluorescence sensor for carbon tetrachloride
Author(s): Ashutosh Sharma; A. Z. Fasihi
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Paper Abstract

A carbon tetrachloride sensor is presented that is based on a novel approach that involves quenching of the fluorescence emission from the second excited state (So $IMP S2 transition) of a dye, congo red, and an air purge mechanism. The Stern-Volmer plot for the sensor response towards carbon tetrachloride in air is linear over the investigated concentration range, 0 - 5 mM, with a Ksv value of 84.85 M-1. The detection limit was found to be 47 (mu) M CCl4 in air. It is suggested that the operating fluorescence quenching process is diffusion controlled and collisional in nature. The sensor is fully reversible with an analytical response time < 25 s and recovery time < 2 s. The environmental applications of this sensor that is capable of providing a reference signal, while in-situ, are discussed.

Paper Details

Date Published: 10 March 1994
PDF: 6 pages
Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); doi: 10.1117/12.170673
Show Author Affiliations
Ashutosh Sharma, Cranfield Univ. (United Kingdom)
A. Z. Fasihi, Cranfield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 2068:
Chemical, Biochemical, and Environmental Fiber Sensors V
Robert A. Lieberman, Editor(s)

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