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Proceedings Paper

Flow optrodes for chemical analysis
Author(s): Richard J. Berman; Lloyd W. Burgess
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Paper Abstract

We have recently demonstrated the use of renewable reagent fiber optic sensors in a harsh sample matrix and with multiple reagent chemistries. Sodium hydroxide concentrations ranging from 1. 5-23. 0 (w/w) (0. 38-7. 2 M) were measured with a single probe chemistry. A sensor for free and total chlorine has been developed in which the reagents were sequentially switched to make the sensor responsive to either free chlorine (N 1 4-phenylene-diamine (DPD) + phosphate buffer) or both free and combined chlorine (DPD + phosphate buffer + KI). The detection limit of free chlorine was 0. 05 mgfL Cl2 at a reagent flow rate of4 j. tLtmin and covering a dynamic range of 0. 05-25 mg/L Cl2. Improvements in sensor fabrication techniques are currently being investigated in order to increase overall sensor functionality.

Paper Details

Date Published: 1 March 1991
PDF: 11 pages
Proc. SPIE 1368, Chemical, Biochemical, and Environmental Fiber Sensors II, (1 March 1991); doi: 10.1117/12.24776
Show Author Affiliations
Richard J. Berman, Univ. of Washington (United States)
Lloyd W. Burgess, Univ. of Washington (United States)


Published in SPIE Proceedings Vol. 1368:
Chemical, Biochemical, and Environmental Fiber Sensors II
Robert A. Lieberman; Marek T. Wlodarczyk, Editor(s)

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