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Proceedings Paper

Fibre optic evanescent sensing of gaseous ammonia with a near infrared dye for leak detection
Author(s): E. Scorsone; Simon Christie; K. Persaud; P. Simon; Frank Kvasnik
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Paper Abstract

We report here the detection of gaseous ammonia with the methylated and ethylated forms of dyes that were originally developed in a CEC program to produce spectral changes in the near infrared (NIR) region on exposure to ammonia. In contrast with pH sensitive dyes, these new dyes are suited for the detection of gaseous ammonia both in moist and dry air. The dyes have been immobilized in the cladding material of commercial available plastic-clad silica fibers and the evanescent detection of gaseous ammonia was achieved with the limit of detection in dry air being 100 ppm for 2m length of the sensing fiber.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.527082
Show Author Affiliations
E. Scorsone, Univ. of Manchester Institute of Science and Techn (United Kingdom)
Simon Christie, Univ. of Manchester Institute of Science and Techn (United Kingdom)
K. Persaud, Univ. of Manchester Institute of Science and Techn (United Kingdom)
P. Simon, Slovak Univ. of Technology (Slovak Republic)
Frank Kvasnik, Univ. of Manchester Institute of Science and Techn (United Kingdom)


Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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