Abstract
The sensitivity of a multi-channel mode-filtered light detection system has been enhanced by using a dual-light source irradiation technique. The detection system was constructed from an annular column consisting of a bare optical fibre inserted into a capillary. Sample was introduced through the gap between the fibre and the capillary. A multi-channel charge-coupled device was set on the side of the capillary at which four detection windows could be simultaneously monitored. The changes in the intensities of the mode-filtered light on exposure to various concentrations of ethanol samples from each detection window were monitored. The theoretical studies on the sensitivity of detection of the detection system using dual-light source irradiation have been described. The sensitivity of detection was enhanced when a dual-light source instead of a single-light source was employed. The working concentration range for ethanol was 0-80% (v/v) ethanol. The limit of detection was determined to be 1% (v/v) ethanol. The proposed method has been successfully applied to the determination of ethanol contents of some wine samples. The results were satisfactory compared with values obtained from a standard reference method.
Original language | English |
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Pages (from-to) | 301-310 |
Number of pages | 10 |
Journal | Analytica Chimica Acta |
Volume | 481 |
Issue number | 2 |
DOIs | |
Publication status | Published - 3 Apr 2003 |
Scopus Subject Areas
- Analytical Chemistry
- Biochemistry
- Environmental Chemistry
- Spectroscopy
User-Defined Keywords
- Dual-light source
- Mode-filtered light
- Multi-channel detection