Fiber optic sensors based on time-release polymers

Steven M. Barnard; David R. Walt

doi:10.1117/12.17560

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1 July 1990 Fiber optic sensors based on time-release polymers

Steven M. Barnard; David R. Walt

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Proceedings Volume 1201, Optical Fibers in Medicine V; (1990) https://doi.org/10.1117/12.17560
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

Abstract

Fiber-optic sensors based on a controlled-release polymer provide sustained release of indicating reagents over long periods. This technique allows irreversible chemistries to be used in the design of sensors for continuous measurements. The first reported sensor used 8-hydroxypyrene- 1 ,3,6-trisulfonic acid and sulforhodamine 640 to measure pH continuously for three months in the range of 5.5 to 8.0 with a precision units. The sensor reported in this paper is based on a fluorescence energy transfer immunoassay. The sensor was cycled through different concentrations of antigen continuously for 30 hours. Although the sensor was not optimized, the data indicates the viability of the technique.

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Steven M. Barnard and David R. Walt "Fiber optic sensors based on time-release polymers", Proc. SPIE 1201, Optical Fibers in Medicine V, (1 July 1990); https://doi.org/10.1117/12.17560

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