Self-Referencing Fiber-Optic Fluorescence Sensor for Turbid Samples
Publication: Journal of Environmental Engineering
Volume 124, Issue 6
Abstract
A novel single-fiber optical sensor was developed to measure solute fluorescence and to estimate a correction factor to compensate for the signal attenuation caused by suspended particles. The latter was effected using a reference fluorescer mounted beyond the end of the fiber tip. This sensor is intended for monitoring of contaminants in model aquifers and is adaptable to field use. The suspensions tested were Ca-montmorillonite, polystyrene latex beads, and silica. A tracer dye was used as the test analyte so that sorption of the sample onto the suspended particles would be negligible. The relationship between the reference fluorescence attenuation and the analyte attenuation agreed approximately with geometric prediction and could be determined without knowledge of the particle size distribution or the type of particles used. The results indicated that corrected solute fluorescence intensities could be obtained by successively sending an analyte excitation wavelength and a reference excitation wavelength into the fiber-optic sensor.
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References
1.
Air Force Center for Environmental Excellence. (1995). “Real time continuous measurement of subsurface contaminant with the rapid optic screening tool (ROST;ot).”ROST;ot Data Rep., Brooks Air Force Base.
2.
Backhus, D. A., and Gschwend, P. M.(1990). “Fluorescent polycyclic aromatic hydrocarbons as probes for studying the impact of colloids on pollutant transport in groundwater.”Envir. Sci. and Technol., 24, 1214–1223.
3.
Bethune, D. S.(1981). “Dye cell design for high-power low-divergence excimer-pumped dye lasers.”Appl. Opt., 20, 1897–1899.
4.
Brooks Air Force Base. (1995). U.S. Air Force Environmental, Safety, and Occupational Health Technology Needs Survey[HSC/XR, FY96 draft].
5.
Cespedes, E. R., Miles, B. H., and Lieberman, S. H. (1994). “Development of optical sensors for the site characterization and analysis penetrometer system (SCAPS).”Proc., Optical Sensing for Envir. Monitoring, SP-89, 621–632.
6.
“Environmental update: Cleaning up federal waste.” (1995). Military Engr., 87(574), 6.
7.
Gillispie, G. D., and St. Germain, R. W.(1992). “In-situ tunable fluorescence analysis of hydrocarbons.”Proc., SPIE Int. Soc. Opt. Eng., 1637, 151–162.
8.
Jack, L.(1995). “Cone penetrometer mounted sensors.”EPA Tech Trends[EPA/542/N-95/5], 21, 2.
9.
MacIntyre, W. G., Stauffer, T. B., and Antworth, C. P.(1991). “A comparison of sorption coefficients determined by batch, column, and box methods on a low organic carbon aquifer material.”Ground Water, 29, 908–913.
10.
Skoog, D. A., and West, D. M. (1971). Principles of instrumental analysis. Holt, Rinehart and Winston, New York, N.Y.
11.
Smart, P. L., and Laidlaw, I. M. S.(1977). “An evaluation of some fluorescent dyes for water tracing.”Water Resour. Res., 13, 15–33.
12.
Van Keuren, E. R., Wiese, H., and Horn, D.(1993). “Fiber-optic quasielastic light scattering in concentrated latex dispersions: Angular dependent measurements of singly scattered light.”Langmuir, 9, 2883–2887.
13.
Zhu, Y. Z., and Yappert, M. C.(1992). “Determination of effective depth and equivalent pathlength for a single-fiber fluorometric sensor.”Appl. Spectrosc., 46, 912–918.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 124 • Issue 6 • June 1998
Pages: 545 - 548
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Jun 1, 1998
Published in print: Jun 1998
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