SYNTHESIS OF PH-SENSITIVE MODIFIED CELLULOSE ETHER HALFESTERS AND THEIR USE IN PH DETECTING SYSTEMS BASED ON FIBER OPTICS

Authors
LIEBERT TF WALT DR
Citation
Tf. Liebert et Dr. Walt, SYNTHESIS OF PH-SENSITIVE MODIFIED CELLULOSE ETHER HALFESTERS AND THEIR USE IN PH DETECTING SYSTEMS BASED ON FIBER OPTICS, Journal of controlled release, 35(2-3), 1995, pp. 155-163
Citations number
20
Categorie Soggetti
Pharmacology & Pharmacy",Chemistry
Journal title
Journal of controlled release → ACNP
ISSN journal
01683659
Volume
35
Issue
2-3
Year of publication
1995
Pages
155 - 163
Database
ISI
SICI code
0168-3659(1995)35:2-3<155:SOPMCE>2.0.ZU;2-T
Abstract
The syntheses of several derivatized cellulose ether halfesters with d issolution points above pH 7 are described. Fluorescent dyes were inco rporated into these polymers, and the rate of fluorescent dye release as a function of pH was determined. Dye containing polymers were emplo yed to create a new fiber optic sensor system for detecting pH changes over long time periods. In this study, sensors were prepared using po lymers with high sensitivity in the pH region between 9.2 and 12. Sens ors responded within 30 s after being exposed to basic solutions.