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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/1770

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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