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Electrochemical study of the components of Karl Fischer reagent on platinum rotating disk electrode

✍ Scribed by J.L. Guiñón; R. Grima; J. García-Antón

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
452 KB
Volume
36
Category
Article
ISSN
0013-4686

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✦ Synopsis

The electrochemical hehaviour of sulphur dioxide and iodide in aqueous and organic solutions at a platinum rde has been studied. For sulphur dioxide the electrodic process is non-reversible and is not controlled by diffusion; the dielectric constant and viscosity of solutions have a direct and reverse effect, respectively, on the limiting current. Iodide, as hydroiodic acid, shows a simple electrodic process which is reversible and controlled by diffusion, Iodide as hydrogen iodide solvated with pyridine shows a process of desorption and disprotonation prior to the oxidation to iodine; the direct and inverse constants, K, = 2.3 x lO-'o and KA = 5.8 x lo-', are calculated. The amperometric study of KF reagent is carried out.

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