Kosch, Ute and Klimant, Ingo and Wolfbeis, Otto S. (1999) Long-lifetime based pH micro-optodes without oxygen interference. FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 364 (1-2). pp. 48-53. ISSN 0937-0633,
Full text not available from this repository.Abstract
The first decay time-based fiber optic pH mi crosensors are presented which are without cross-sensitivity to molecular oxygen. They are based on radiationless energy transfer from the donor ruthenium(TI)-tris(1,10-phenanthroline) to a pH-sensitive sulfonephthalein acceptor dye. The microsensors have decay times in the microsecond range, a fact that makes them compatible with existing devices designed for optical oxygen microsensing. The sensor tips have diameters of 20 to 30 mu m. Outstanding features are the excellent mechanical stability and the inertness to quenching by oxygen. The dynamic range depends on the pK(a) of the selected pH indicator. The sensors were characterized with respect to the dynamic range, response, storage stability and photostability. A high resolution pH measurement in a marine sediment core serves as an example for its utility.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MICROSENSOR; MICROELECTRODE; STRATEGIES; COMPLEXES; SENSOR; |
| 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: | 25 Oct 2022 08:53 |
| Last Modified: | 25 Oct 2022 08:53 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48275 |
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