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Journal of Nutrition Vol. 32 No. 5 November 1946, pp. 559-565
Copyright © 1946 by American Society for Nutrition
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Photosensitized Oxidation of Ascorbic Acid in Urine and Blood Serum

Mary L. Dodds, Florence L. MacLeod and Juanita Smith Carr

Agricultural Experiment Station, University of Tennessee, Knoxville

1. The photosensitized oxidation of reduced ascorbic acid in urine preserved at pH 2 to 3 has been shown to take place.
2. The ascorbic acid is present in the urine after oxidation as dehydroascorbic acid.
3. The reaction depends upon the presence of dissolved oxygen.
4. The reaction is accelerated by increasing amounts of riboflavin.
5. A loss of reduced ascorbic acid occurs in blood serum exposed to light.

Manuscript received 8 July 1946.




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