Fibre optic evanscent sensing of gaseous ammonia with a near infrared dye for leak detection

E. Scorsone; Simon Christie; K. Persaud; P. Simon; Frank Kvasnik

doi:10.1117/12.527082

19 November 2003 Fibre optic evanescent sensing of gaseous ammonia with a near infrared dye for leak detection

E. Scorsone, Simon Christie, K. Persaud, P. Simon, Frank Kvasnik

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.527082
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

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.

Citation Download Citation

E. Scorsone, Simon Christie, K. Persaud, P. Simon, and Frank Kvasnik "Fibre optic evanescent sensing of gaseous ammonia with a near infrared dye for leak detection", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.527082

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