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Proceedings Paper

Plastic optical fiber sensor for gastric ph detection
Author(s): Francesco Baldini; Susanna Bracci; Franco Cosi
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Paper Abstract

An optical fiber sensor for gastric pH detection is described, making use of plastic fibers as light carriers and a proper electronic system for both source driving and signal processing. The use of a suitable microprocessor and an internal buffer allows the realization of a portable and reliable device, fed by batteries. The indicators, bromophenol blue (BPB) or thymol blue (TB), are immobilized on controlled pore glass (CPG) fixed at the end of plastic optical fibers following a proprietary process. The realized optrode, satisfying clinical requirements, was tested `in vitro.' A precision of <EQ 0.04 pH units and a response time of (<EQ 15 seconds) were reached.

Paper Details

Date Published: 15 February 1994
PDF: 4 pages
Proc. SPIE 2085, Biochemical and Medical Sensors, (15 February 1994); doi: 10.1117/12.168759
Show Author Affiliations
Francesco Baldini, IROE/CNR (Italy)
Susanna Bracci, IROE/CNR (Italy)
Franco Cosi, IROE/CNR (Italy)


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

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