Development of an optical-fibre sensor using a functional membrane

A new functional membrane which changes its reflectance spectra according to the pH of the test solution is described. A chloromethylstyrene (CMS)/methylmethacrylate (MMA) copolymer was chosen as the base for the immobilized reagent. A basic ion-exchanger was then added to the CMS/MMA copolymer. Bro...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 1993-05, Vol.13 (1), p.427-428
Main Authors: Takai, Nobuharu, Hirai, Toshiyuki, Sakuma, Ichiro, Fukui, Yasuhiro, Kaneko, Akiko, Fujie, Tadao
Format: Article
Language:English
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Summary:A new functional membrane which changes its reflectance spectra according to the pH of the test solution is described. A chloromethylstyrene (CMS)/methylmethacrylate (MMA) copolymer was chosen as the base for the immobilized reagent. A basic ion-exchanger was then added to the CMS/MMA copolymer. Bromothymol Blue (BTB) was then immobilized on the copolymer. A functional membrane could then be fabricated in various shapes since chemical modification of CMS/MMA copolymer could be performed before casting. The fabricated pH sensitive functional membrane showed a maximum reflectance change at a wavelength of 540 nm for pH changes from 4.0 to 9.0. Dissolution of BTB from the CMS/MMA copolymer was minimal so that good reproducibility of the reflectance change was obtained.
ISSN:0925-4005
1873-3077
DOI:10.1016/0925-4005(93)85418-A