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Proceedings Paper

CR (III) and CR (VI) detection in water environment using an optical fiber grating sensor
Author(s): Ricardo C. Kamikawachi; G. R.C. Possetti; Marcia Muller; Hypolito Jose Kalinowski; Jose Luis Fabris
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Paper Abstract

This work shows the application of an optical sensor to detect the presence of Cr(III) and Cr(VI) oxidation states in water solutions. The sensing device is a long period grating produced in a standard telecommunication optical fiber by applying a suitable number of point-to-point electrical arc discharges from a fusion splicer. In order to analyze the Cr(III) and Cr(VI) solutions, the sensing device is kept into a recipient under constant longitudinal stress and the Chromium solution samples are added to it. The results show that the sensor can not only detect the presence, but also differentiate between the two-oxidation states. Samples with Chromium concentrations from 0.16 mg/l to 5.2 mg/l are analyzed, leading to maximum wavelength shifts (relative to the LPG in pure water) of 0.14 nm and 0.26 nm for Cr(III) and Cr(VI), respectively. A comparison between the results obtained for both solutions shows that is possible to identity any of the Chromium oxidation states present in the sample until a lower limit concentration of 2.6 mg/l for the employed set-up.

Paper Details

Date Published: 21 October 2004
PDF: 4 pages
Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); doi: 10.1117/12.591584
Show Author Affiliations
Ricardo C. Kamikawachi, Ctr. Federal de Educacao Technologica do Parana (Brazil)
G. R.C. Possetti, Ctr. Federal de Educacao Technologica do Parana (Brazil)
Marcia Muller, Ctr. Federal de Educacao Technologica do Parana (Brazil)
Hypolito Jose Kalinowski, Ctr. Federal de Educacao Technologica do Parana (Brazil)
Jose Luis Fabris, Ctr. Federal de Educacao Technologica do Parana (Brazil)


Published in SPIE Proceedings Vol. 5622:
5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications
Aristides Marcano O.; Jose Luis Paz, Editor(s)

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