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Proceedings Paper

Optical pH sensor for physiological pH measurement
Author(s): Sifu Zhang; Peter J. Rolfe; Yappa A.B.D. Wickramasinghe
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Paper Abstract

A miniature optical sensor based on the fluorescent indicator, 8-hydroxyl-1,3,6-pyrene trisulfonic Acid Trisodium Salt (HOPSA), was developed for physiological pH measurement. Dowex-1 strongly basic anion exchange resin was used as a medium to immobilize the indicator on the end of an optical fiber to form a pH sensing layer. Polyetherurethane was dip- coated onto the sensing layer as the permeable membrane for H+. The properties of the sensor were assessed and found to be suitable for monitoring physiological pH values.

Paper Details

Date Published: 15 February 1994
PDF: 7 pages
Proc. SPIE 2085, Biochemical and Medical Sensors, (15 February 1994); doi: 10.1117/12.168757
Show Author Affiliations
Sifu Zhang, Keele Univ. (United Kingdom)
Peter J. Rolfe, Keele Univ. (United Kingdom)
Yappa A.B.D. Wickramasinghe, Keele Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 2085:
Biochemical and Medical Sensors
Otto S. Wolfbeis, Editor(s)

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