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Fiber Optic Sensing of Cyanides in Solutions

Published online by Cambridge University Press:  15 February 2011

S. S. Park ,
J. D. Mackenzie ,
C. Y. Li ,
P. Guerreiro  and
N. Peyghambarian
S. S. Park
Affiliation:
MSE Department, University of California, Los Angeles, CA 90095, sspark@seas.ucla.edu
J. D. Mackenzie
Affiliation:
MSE Department, University of California, Los Angeles, CA 90095, sspark@seas.ucla.edu
C. Y. Li
Affiliation:
Optical Sciences Center, University of Arizona, Tucson, AZ 85721
P. Guerreiro
Affiliation:
MSE Department, University of California, Los Angeles, CA 90095, sspark@seas.ucla.edu
N. Peyghambarian
Affiliation:
MSE Department, University of California, Los Angeles, CA 90095, sspark@seas.ucla.edu
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Abstract

A novel sol-gel technique was used to immobilize malachite green ions (MG+) in stable, optically transparent, porous silica gel films. A simple and sensitive method was developed for the detection of cyanides in solutions using spectrophotometry to measure changes caused by cyanide ions (CN−) in the absorption spectra of the green-colored silica gel films. After reaction with cyanide ions, the absorption spectra of the films changed with a typical decrease in absorbance at 620 nm. On the basis of the absorption spectra of the films, a portable and easy to use fiber optic cyanide film sensor was fabricated. Decolorization undergone by the greencolored gel films, as they were exposed to cyanide ions, was detected through a fiber. Preliminary results indicate concentrations on the order of a few ppm are detected using the fiber optic sensor.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 435: Symposium V – Better Ceramics Through Chemistry VII , 1996 , 667
Copyright
Copyright © Materials Research Society 1996

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References

[1] U.S. Environmental Protection Agency, In-Situ Monitoring at Superfund Sites with Fibre Optics: 1. Rationale,, (U.S. E.P.A., Nevada, 1987), p. 1.Google Scholar
[2] Ellerby, L. M., Nishida, C. R., Nishida, F., Yamanaka, S. A., Dunn, B., Valentine, J. S., Zink, J. I., Encapsulation of Proteins in Transparent Porous Silicate Glasses Prepared by the Sol-Gel Method, Science, 255, p. 1113 (1992).Google Scholar
[3] Lev, O., Tsionsky, M., Rabinovich, L., Glezer, V., Sampath, S., Pankratov, I., J. Gun, Organically Modified Sol-Gel Sensors, Analytical Chemistry, 67, p. 22A (1995).Google Scholar
[4] Klein, L. C., Sol-Gel Technology for Thin Films, Fibres, Preforms, Electronics, and Speciality Shapes, (Noyes Publications, New Jersey, 1988), p. 49.Google Scholar
[5] Holmes, E.O., The Effects of the Properties of Solvents of Various Dielectric Constants and Structures on the Photoionization of the Leucocarbinols and Leucocyanides of Malachite Green, Crystal Violet, and Sunset Orange and Related Phenomena, J. Phys. Chem., 70, p. 1037 (1966).Google Scholar