THIOCYANATE ION-SELECTIVE PVC MEMBRANE ELECTRODE
A potentiometric selective sensor based on trinuclear chromium(III) complex as a novel ionophore for the thiocyanateselective electrode is reported. The sensor displays a near Nernstian slope of 57 ± 2 mV per decade, over a wide pH range 3 - 11. The working concentration range of the electrode is 1...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Academy of Sciences of Moldova, Institute of Chemistry
2010-06-01
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| Series: | Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry |
| Subjects: | |
| Online Access: | http://www.cjm.asm.md/sites/default/files/article_files/73-77%20Revenco.pdf |
| Summary: | A potentiometric selective sensor based on trinuclear chromium(III) complex as a novel ionophore for the thiocyanateselective electrode is reported. The sensor displays a near Nernstian slope of 57 ± 2 mV per decade, over a wide pH range 3 - 11. The working concentration range of the electrode is 1.10-5 – 1.10-1 mol/l with a detection limit of 5.10-6 mol/l. The sensor has a
response time of 20 s and can be used for at least 6 months without any considerable fluctuation of the potential. The selectivity coefficients determined at using the fixed interference method
indicate a good discriminating ability towards other anions. The prepared sensor was applied as an indicator electrode in the titration of thiocyanate with Ag+. |
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| ISSN: | 1857-1727 2345-1688 |