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Articolul urmator |
1082 15 |
Ultima descărcare din IBN: 2024-04-03 20:43 |
SM ISO690:2012 REVENKO, M., DÎRU, Mariana, DAYYIH, WaellA.A.. Thiocyanate ion-selective pvc membrane electrode
. In: Chemistry Journal of Moldova, 2010, nr. 1(5), pp. 73-77. ISSN 1857-1727. |
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Chemistry Journal of Moldova | ||||||
Numărul 1(5) / 2010 / ISSN 1857-1727 /ISSNe 2345-1688 | ||||||
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Pag. 73-77 | ||||||
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A potentiometric selective sensor based on trinuclear chromium (III) complex as a novel ionophore for the thiocyanate-selective 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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Cuvinte-cheie thiocyanate, titration, potentiometric sensor |
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