Abstract
Bromophenol blue, a pH indicator, was entrapped in porous glass films prepared by the sol-gel method. The colorimetric response of the films to pH was assessed visibly and by attenuated total reflectance spectrometry. The entrapped indicator was nonleachable and responded to solution pH changes in a reversible manner. The immobilization of indicator molecules in porous sol-gel films appears to be a particulary promising approach to optical waveguide sensor development.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 265-269 |
| Number of pages | 5 |
| Journal | Analytica Chimica Acta |
| Volume | 285 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 28 1994 |
| Externally published | Yes |
Keywords
- Attenuated total reflectance
- Bromophenol blue
- Colorimetry
- Indicators
- Porous glass films
- Sol-gel method
ASJC Scopus subject areas
- Analytical Chemistry
- Environmental Chemistry
- Biochemistry
- Spectroscopy