Huber, Christian and Klimant, Ingo and Krause, Christian and Werner, Tobias and Mayr, Torsten and Wolfbeis, Otto S. (2000) Optical sensor for seawater salinity. FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 368 (2-3). pp. 196-202. ISSN 0937-0633
Full text not available from this repository.Abstract
An optical sensor for the measurement of salinity in seawater has been developed. It is based on a chloride-quenchable fluorescent probe (lucigenin) immobilized on a Nafion film. Two approaches for measuring salinity via chloride concentration are presented. In the first, a change in salinity corresponds to a change in the fluorescence intensity of lucigenin. In the second, the fluorescence intensity information is converted into a phase angle information by adding an inert phosphorescent reference luminophore (a ruthenium complex entrapped in poly(acrylonitrile) beads). Under these conditions, the chloride-dependent fluorescence intensity of lucigenin can be converted into a chloride-dependent fluorescence phase shift which serves as the analytical information. This scheme is referred to as dual lifetime referencing (DLR). The sensor was used to determine the salinity in seawater and brackish water of the North Sea.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SENSITIVE FLUORESCENT INDICATORS; METAL-LIGAND COMPLEXES; CHEMI-LUMINESCENCE; FLUOROPHORES; PH; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Antje J. Bäumner, formerly Prof. Wolfbeis) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Mar 2022 06:01 |
| Last Modified: | 28 Mar 2022 06:01 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42229 |
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