[Evaluation of prooxidant properties of ascorbic acid].
Chemiluminescence of ascorbic acid in Fenton solution was investigated at acid concentration from 10(-7) to 1 mol/l. The yield of chemiluminescence exceeds spontaneous light from Fenton solution at [Asc] - 10(-4) - 10(-3) mol/l in the presence of dissolved oxygen, and prooxidant properties are displayed. When there is no oxygen in solution, this effect is not observed. A comparison of experimental data and oxidation process simulation shows that ascorbic acid is an antioxidant. Its transformation products in the presence of oxygen exert prooxidant properties.
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D000975:Antioxidants / Q000737:chemistry*; D001205:Ascorbic Acid / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D049449:Luminescence; D008163:Luminescent Measurements; D008956:Models, Chemical; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000737:chemistry*; D013816:Thermodynamics
D000975:Antioxidants; C045076:Fenton's reagent; D016877:Oxidants; D017382:Reactive Oxygen Species; D006861:Hydrogen Peroxide; D007501:Iron; D001205:Ascorbic Acid; D010100:Oxygen