Abstract
We report an optical fibre probe for mercury detection based on a sensitised alumina cladding. The interaction between the sensitive material and the guided light wave is effected by means of evanescent-field coupling, wherein the colorimetric changes of a Ru(II)-bis-thiocyanate complex modulate the light intensity. The improvement of the water stability measurements of the system has been achieved by treating the alumina clad in sulphuric acid before dye adsorption. A partial least squares calibration model employing spectral features from the optode response enables estimating mercury concentration at a range between 0 and 6 ppm.
| Original language | English |
|---|---|
| Pages (from-to) | 103-110 |
| Number of pages | 8 |
| Journal | Sensors and Actuators B: Chemical |
| Volume | 143 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 4 Dec 2009 |
| Externally published | Yes |
Keywords
- Alumina
- Mercury
- Optical fibre
- PLS