Fabrication and calibration of oxazine-based optic fiber sensor for detection of ammonia in water.
This paper presented the fabrication and calibration of a clad-modified evanescent based plastic optical fiber (POF) sensor for the detection of ammonia in both stagnant and dynamic aqueous media. This optochemical sensor was based on Oxazine 170 perchlorate (sensing material) and polydimethylsiloxane (PDMS) (protective material) thin layers. A special chemical solution was developed for the etching removal of cladding and a methodology for trapping moisture was exercised. Experimental results on dissolved ammonia detection exhibited short response time (≤10 s), low detection limit (minimum detection limit 1.4 ppm), high sensitivity, and excellent reversibility (over 99%).
Purdue Water Institute, Purdue University Calumet, Hammond, Indiana 46323, USA.
Ahmed Hasnain
AH
Jalal
Jinsong
J
Yu
A G Agwu
AG
Nnanna
D000641:Ammonia / Q000032:analysis*; D002138:Calibration; D004129:Dimethylpolysiloxanes / Q000737:chemistry; D005336:Fiber Optic Technology / Q000295:instrumentation*; D057230:Limit of Detection; D055100:Optical Fibers; D010078:Oxazines / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D004129:Dimethylpolysiloxanes; D010078:Oxazines; D014867:Water; C013830:baysilon; D000641:Ammonia