Abstract
The method developed for reversible determination of cadmium ions is based on the incorporation of 8-hydroxyquinoline-5-sulfonic acid into silica films prepared by the sol-gel method. When exposed to a solution containing cadmium ions, a colored complex is formed. The concentration of the colored complex is determined from its characteristic absorption in the visible region using a special apparatus. The detection limit is of sub ppm order. This method can be used for the determination of various heavy metal ions.
| Original language | English |
|---|---|
| Pages (from-to) | 439-443 |
| Number of pages | 5 |
| Journal | Sensors and Materials |
| Volume | 8 |
| Issue number | 7 |
| State | Published - 1996 |
Keywords
- In situ determination of cadmium
- Reversible optical sensor
- Sol-gel optical sensor
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