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Proceedings Paper

Fiber optic and portable instruments for ammonia sensing in field operating conditions
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Paper Abstract

Polymer dye films incorporating a pH indicator, immobilized on a polymer support, can be used for ammonia gas (NH3) sensing in fiber optic and portable instruments in the field operating conditions with changing temperature and humidity. Experimental results on the NH3 detection in the range 0 - 100 mg/m3 are reported for the range of temperature 25 - 45 degree(s)C and 60 - 80% relative humidity. A model of steady-state instrument response in the field has been developed with four adjustable parameters to describe the coupling of ambient NH3 concentration to absorbance change of the sensing element. Practical problems associated with the applications of such sensing chemistry for NH3 monitoring in the field are discussed.

Paper Details

Date Published: 31 December 1993
PDF: 9 pages
Proc. SPIE 2069, Optical Methods for Chemical Process Control, (31 December 1993); doi: 10.1117/12.166276
Show Author Affiliations
Radislav A. Potyrailo, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 2069:
Optical Methods for Chemical Process Control
Stuart Farquharson; Jeremy M. Lerner, Editor(s)

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