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Development of an optical-fibre sensor using a functional membrane

โœ Scribed by Nobuharu Takai; Toshiyuki Hirai; Ichiro Sakuma; Yasuhiro Fukui; Akiko Kaneko; Tadao Fujie

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
178 KB
Volume
13
Category
Article
ISSN
0925-4005

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โœฆ Synopsis

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/hWA 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.

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