Huber, Christian and Werner, Tobias and Krause, Christian and Wolfbeis, Otto S. (1999) Novel chloride-selective optode based on polymer-stabilised emulsions doped with a lipophilic fluorescent polarity-sensitive dye. ANALYST, 124 (11). pp. 1617-1622. ISSN 0003-2654,
Full text not available from this repository.Abstract
A chloride-selective optode is presented which is based on a polymer-stabilised emulsion system consisting of a hydrogel with entrapped plasticizer droplets. The droplets contain a neutral chloride-selective ionophore and a polarity-sensitive cationic fluorescent dye (PSD) located near the droplet surface. The ionophore extracts chloride out of the aqueous solution through the hydrogel into the plasticizer droplets, followed by a displacement of the positively charged PSD into the plasticizer droplet. This concerted process causes a decrease of micro-polarity near the dye, resulting in a dramatic increase in its fluorescence intensity. The sensing scheme can be used for reversible sensing of chloride in the 1-80 mM concentration range with response times on the order of less than 3 min. The sensor membrane has been investigated in terms of signal change, stability, limits of detection and selectivity for the analyte over interferents.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MERCURY ORGANIC-COMPOUNDS; FILM OPTODES; MEMBRANE; ELECTRODES; MECHANISM; SENSORS; PROBES; SERUM; DESIGN; |
| 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: | 13 Dec 2022 07:15 |
| Last Modified: | 13 Dec 2022 07:15 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48860 |
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