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Proceedings Paper

Compact phase-resolved fluorescence spectrometer for detection and discrimination of airborne and waterborne bacteria
Author(s): Robert C. Chin; Michael W. Mayo; William Halliday; Noe Salazar; Clay Cruce; James P. Chambers; James J. Valdes
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Paper Abstract

We report on the development of a compact, portable fluorescence lifetime instrument based on phase resolved fluorescence spectroscopy (PRFS). The PRFS biosensor has been designed for detection and discrimination of individual pathogenic bacteria in a biological mixture. The light source can be modulated from 10 - 200 MHz and fluorescence emission is measured by a miniature photomultiplier tube after passing through a compact spectrometer. We have successfully extracted and measured the existence of a mixture of three far-red fluorescent dyes which have similar or overlapping spectral signatures. Data are presented demonstrating the instrument's ability to separate individual fluorophores from a complex mixture using a specially designed chemometric extraction algorithm. This instrument was designed for the possible direct detection and discrimination of the intrinsic fluorescence of biological warfare agents.

Paper Details

Date Published: 10 December 1996
PDF: 12 pages
Proc. SPIE 2836, Chemical, Biochemical, and Environmental Fiber Sensors VIII, (10 December 1996); doi: 10.1117/12.260589
Show Author Affiliations
Robert C. Chin, Systems and Processes Engineering Corp. (United States)
Michael W. Mayo, Systems and Processes Engineering Corp. (United States)
William Halliday, Systems and Processes Engineering Corp. (United States)
Noe Salazar, Systems and Processes Engineering Corp. (United States)
Clay Cruce, Systems and Processes Engineering Corp. (United States)
James P. Chambers, Univ. of Texas/San Antonio (United States)
James J. Valdes, U.S. Army Edgewood Research, Development and Engineering Ctr. (United States)


Published in SPIE Proceedings Vol. 2836:
Chemical, Biochemical, and Environmental Fiber Sensors VIII
Robert A. Lieberman, Editor(s)

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