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V N Sivasankara Pillai >
Please use this identifier to cite or link to this item:
http://purl.org/purl/1770
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| Title: | A fibre optic evanescent wave sensor used for the detection of trace nitrites in water |
| Authors: | Sivasankara Pillai,V N
Radhakrishnan, P
Nampoori, V P N
Girijavallabhan, C P
Suresh, Kumar P |
| Keywords: | Optical fibre
Evanescent wave sensor
Pollution monitoring
fibre optic sensor |
| Issue Date: | 8-Mar-2002 |
| Publisher: | Journal of Optics : A Pure and Applied Optics |
| Citation: | School of Environmental Studies, Cochin University of Science and Technology |
| Abstract: | A fibre optic technique for detecting trace amounts of nitrite compounds in
water is described. The off-line fibre optic sensor outlined here is based on
evanescent field absorption in a test solution formed by the reaction of nitrite
compounds in water with suitable chemical reagents. A short unclad portion
of a plastic clad silica fibre acts as the sensing region. The experimental
results clearly establish the usefulness of the present technique for detecting
very low concentrations of the order of 1 ppb (parts per billion) of nitrite
compounds with a large dynamic range of 1–1000 ppb. Such a high
sensitivity enables the present device to be used for measuring the nitrite
content in drinking water. |
| URI: | http://dyuthi.cusat.ac.in/purl/1770 |
| Appears in Collections: | V N Sivasankara Pillai
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