Original scientific paper

Mechanism of Dehydro-L-ascorbic Acid Reduction at Mercury Dropping Electrode

Yakov I. Tur'yan ; The National Physical Laboratory of Israel, Danciger "A« Bldg., Givat Ram, Jerusalem 91904, Israel
Ron Kohen ; Department of Pharmacy, The Hebrew University of Jerusalem, POB 12065, Jerusalem, 91120, Israel

Abstract

Quantitative substantiation of the difference in the intennediate
stages of dehydro-L-ascorbic acid polarographic reduction to L-ascorbic
acid and of L-ascorbic acid polarographic oxidation to dehydro- L-ascorbic acid is given. It has been established that the first process is described by the CrEqrCi mechanism with the preceding reversible and the following irreversible rate detennining chemical stages and with the quasi-reversible transfer of the first electron in two parallel stages with and without participation of proton.

Keywords

Hrčak ID:

176961

URI

https://hrcak.srce.hr/176961

Publication date:

1.5.1997.

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