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Proceedings Paper

Gastric pH sensing with controlled pore glasses (CPGs) fixed at the distal end of plastic optical fibers
Author(s): Francesco Baldini; Paolo Bechi; Susanna Bracci; Franco Cosi; Filippo Pucciani
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Paper Abstract

An optical fibre sensor for gastric pH detection is here described, making use of plastic optical fibres (POF) 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 glasses (CPGs) fixed at the end of POFs following a proprietary process. The optrode, satisfying clinical requirements, was tested in vitro and in vivo. Precision 0.05 pH units and response time ( 25 seconds) were reached.

Paper Details

Date Published: 21 October 1994
PDF: 5 pages
Proc. SPIE 2293, Chemical, Biochemical, and Environmental Fiber Sensors VI, (21 October 1994); doi: 10.1117/12.190965
Show Author Affiliations
Francesco Baldini, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)
Paolo Bechi, Univ. di Firenze (Italy)
Susanna Bracci, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)
Franco Cosi, Istituto di Ricerca sulle Onde Elettromagnetiche/CNR (Italy)
Filippo Pucciani, Univ. di Firenze (Italy)


Published in SPIE Proceedings Vol. 2293:
Chemical, Biochemical, and Environmental Fiber Sensors VI
Robert A. Lieberman, Editor(s)

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