The ESR and UV-VIS Studies on the Reaction Between Ascorbic Acid and Iron Ion.

With ESR spin trapping methods and UV-VIS spectrometry, the reaction between ascorbic acid and iron ion was studied. It was found that one mole of ascorbic acid was able to reduce four moles of ferric ions, but no ESR signal of any radical was observed. Based on the above experiments the mechanisms of these reactions were suggested and effects of ascorbic acid in antioxidation and the promoting of oxidation were discussed.