10 December 1996 Fiber-optic-based measurement of ammonia for water monitoring applications
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A procedure has been developed for the measurement of ammonia in water. The paper describes the effect of the ammonia concentration on the emission of a fluorescent dye. From a plot of change in fluorescence against ammonia concentration, a linear response is achieved up to 250 ppb, with a detection limit of 8 ppb. When subjected to a solution of 50 ppb NH3, the device showed 90% recovery of the original signal, within approximately 6 sec. The immobilized form of the fluorophore ensures an interaction with only molecular ammonia (NH3) rather than ammonium ions. Hence the fiber-optic device based on the method reported here is insensitive to pH effects.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ashutosh Sharma, Ashutosh Sharma, Sohail Hamid Sheikh, Sohail Hamid Sheikh, } "Fiber-optic-based measurement of ammonia for water monitoring applications", Proc. SPIE 2836, Chemical, Biochemical, and Environmental Fiber Sensors VIII, (10 December 1996); doi: 10.1117/12.260998; https://doi.org/10.1117/12.260998

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