Kinetics for Singlet Oxygen Formation by Riboflavin Photosensitization and the Reaction between Riboflavin and Singlet Oxygen

• DOI: 10.1111/j.1365-2621.2004.tb09924.x
• Publication Date: 2010-08-10T18:04:11Z
• Authors: R. Huang; E. Choe; D.B. Min
• Keywords: Sodium azide

ABSTRACT: The formation of singlet oxygen by riboflavin and the kinetics mechanisms degradation in aqueous solution under light were determined. rate was 2.31 μmole oxygen/mL headspace/h serum bottle. degradations 66% D 2 O 40% H O, respectively, after 24 h. results indicate that is involved destruction light. destructions 94.0% 15.7% with 0 mM or 160 ascorbic acid, 96 reaction between 1.01 × 10 /M/s, which a diffusion‐controlled rate. This explains extremely fast foods Ascorbic acid sodium azide reduce different quenching mechanisms. quenched both excited triplet riboflavin. Sodium only 1.547 7 /M/s. With involvement Type‐I Type‐II light, quencher alone could not protect from completely. Addition can oxidation exposed to