KINETICS OF THE ALIZARINE-RED-S SURFACE REDOX REACTION

Authors
KOMORSKYLOVRIC S
Citation
S. Komorskylovric, KINETICS OF THE ALIZARINE-RED-S SURFACE REDOX REACTION, Fresenius' journal of analytical chemistry, 356(3-4), 1996, pp. 306-309
Citations number
18
Categorie Soggetti
Chemistry Analytical
Journal title
Fresenius' journal of analytical chemistry → ACNP
ISSN journal
09370633
Volume
356
Issue
3-4
Year of publication
1996
Pages
306 - 309
Database
ISI
SICI code
0937-0633(1996)356:3-4<306:KOTASR>2.0.ZU;2-3
Abstract
Kinetics of the surface redox reaction of alizarine red S adsorbed on mercury is measured by square-wave voltammetry. In 1 mol/l KNO3 buffer ed to pH 9.22, the standard reaction rate constant of the redox couple anthraquinone/anthrahydroquinone in the adsorbed alizarine red S mole cule is k(s) = 100 +/- 10 s(-1) and the cathodic transfer coefficient is alpha = 0.4. At pH 2 in this medium k(s) is greater than 500 s(-1).