Back to Search
Start Over
Chitosan Membranes for Optical pH Chemical Sensors
- Source :
- Journal of Life Support Engineering. 9:13-18
- Publication Year :
- 1997
- Publisher :
- The Society of Life Support Technology, 1997.
-
Abstract
- A three-layer membrane for optical pH chemical sensors has been developed consisting of layers of polyester support, chitosan-indicator and polyvinly alcohol-titanium dioxide for reflection. The chitosan membrane was more stable and easier for immobilizing of benzopurprine 4B or fluorescein isothiocyanate than a cellulose membrane on which polyvinyl alcohol with titanium dioxide and calcium carbonate was coated and heated at 140°C in nitrogen atmosphere followed by dissolving of calcium carbonate to form a porous water-resistant membrane for reflection of light. The sensor membrane shows a pH-induced color change than makes it capable of measuring pH in the 3-7 range.
Details
- ISSN :
- 18845827 and 13419455
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of Life Support Engineering
- Accession number :
- edsair.doi...........c1c5358264e0d74be269ba1f360fc2e9