Huber, Christian and Werner, Tobias and Krause, Christian and Wolfbeis, Otto S. and Leiner, Marc J. P. (1999) Overcoming the pH dependency of optical sensors: a pH-independent chloride sensor based on co-extraction. ANALYTICA CHIMICA ACTA, 398 (2-3). pp. 137-143. ISSN 0003-2670,
Full text not available from this repository. (Request a copy)Abstract
A chloride-selective optode is presented which is based on a polymer-stabilized emulsion system which consists of a hydrogel into which plasticizer droplets are incorporated containing a neutral chloride-selective ionophore. A solvatochromic cationic fluorescent dye is located in the hydrogel. When the ionophore extracts chloride out of the aqueous solution into the plasticizer droplets, the positively charged dye is co-extracted for reasons of electroneutrality. This concerted reaction causes a decrease of micro-polarity near the dye, resulting in an increase of its fluorescence intensity along with a bathochromic shift of the emission maximum. This system can be used for pH-independent reversible sensing of chloride in the 10-100 mM concentration range with response times of the order of 3 min. (C) 1999 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SENSITIVE POLYMER MEMBRANES; MERCURY ORGANIC-COMPOUNDS; SELECTIVE ELECTRODES; FLUORESCENT DYES; SERUM; COEXTRACTION; POTASSIUM; emulsion; chloride; optical sensor; co-extraction; pH independence |
| 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 13:11 |
| Last Modified: | 13 Dec 2022 13:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48914 |
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