Spectral study of ascorbic acid forms in radical chain oxidation processes in aprotic medium
Abstract
UV-spectrophotometrically confirmed the existence of reduced, oxidized and ionic forms of ascorbic acid in solutions obtained as a result of auto-oxidation of ascorbic acid in aprotic medium and oxidation of organic substrate in the ascorbic acid presence. NMR spectroscopy showed that ascorbic acid during the inhibition of radical chain oxidation of an organic substrate in the aprotic medium at 348 K irreversibly oxidizes to dehydroascorbic acid. It has been proved that further dehydroascorbic acid oxidation with the 2,3-diketogulonic acid formation does not occur under these conditions.
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