Abstract
1. The effects of imidazole derivatives on the autoöxidation of L-ascorbic acid were studied.
At pH 7.1, imidazolecarboxylic acid was the most accelerative, while methylimidazole was the most depressive. These effects reversed at pH 4.3.
2. The ultraviolet absorption spectra of L-ascorbic acid-imidazole derivative-phosphate buffer system was measured, and the possibility of the complex formation between L-ascorbic acid and imidazole derivatives was examined.
3. The effects of these imidazole derivatives were also discussed as regards the differences in the contaminating Cu_??_ concentration.
