𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Membranes for optical pH sensors

✍ Scribed by Yordan Kostov; Stoyan Tzonkov; Ljubov Yotova; Milka Krysteva

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
424 KB
Volume
280
Category
Article
ISSN
0003-2670

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✦ Synopsis

A method for producing membranes for optical pH sensors is described. The pH indicators (Neutral Red and Congo Red) are covalently bonded to a transparent acetylcellulose film. The membranes have good durability (> 9 months) and a short response time (ca. 30 s). The method is easy to perform and uses acetylcellulose as a carrier. The reagents for activating the cellulose support are inexpensive, non-toxic and widely available.

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