Abstract
The syntheses of several derivatized cellulose ether halfesters with dissolution points above pH 7 are described. Fluorescent dyes were incorporated into these polymers, and the rate of fluorescent dye release as a function of pH was determined. Dye containing polymers were employed to create a new fiber optic sensor system for detecting pH changes over long time periods. In this study, sensors were prepared using polymers with high sensitivity in the pH region between 9.2 and 12. Sensors responded within 30 s after being exposed to basic solutions.
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