Collect. Czech. Chem. Commun. 1982, 47, 744-754

The kinetics of partial processes in the oxidation of ascorbic acid catalyzed by vanadyl tetrasulphophthalocyanine

Dana M. Wagnerováa, Jaroslav Votrubab, Jürgen Blanckc and Josef Vepřek-Šiškaa

a Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 160 00 Prague 6
b Institute of Microbiology, Czechoslovak Academy of Sciences, 140 00 Prague 4
c Central Institute of Molecular Biology, Academy of Sciences of the German Democratic Republic, 1115 Berlin-Buch, GDR


The rapid partial reactions of the oxidation of ascorbic acid by dioxygen with vanadyl tetrasulphophthalocyanine as a catalyst were studied by the stopped-flow method. The experimental data were treated on a computer and compared with the kinetic implications resulting from the proposed mechanism. Application of the adaptive identification method led to quantitative solution of the mechanism, i.e. determination of the values of all the isolated rate constants of the reaction mechanism.