PHOTOSENSITIZED DECOMPOSITION OF ASCORBIC-ACID IN THE PRESENCE OF RIBOFLAVIN

被引：15

作者：

SAHBAZ, F

SOMER, G

机构：

[1] GAZI UNIV,DEPT CHEM,ANKARA 06500,TURKEY

[2] HACETTEPE UNIV,DEPT FOOD ENGN,ANKARA 06532,TURKEY

来源：

FOOD CHEMISTRY | 1993年 / 46卷 / 02期

关键词：

D O I：

10.1016/0308-8146(93)90033-C

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

We studied the riboflavin-sensitized photodecomposition of ascorbic acid by visible light using the polarographic technique. The reaction was carried out at 25-degrees-C in the pH range 2.5-6.0 under anaerobic and aerobic conditions and the reaction rate was found to depend on the pH in both cases. Oxygen was consumed during photooxidation and the rate was limited by the riboflavin concentration. Formation of hydrogen peroxide appeared under both aerobic and anaerobic conditions. Reaction steps related to the formation of hydrogen peroxide were included in the reaction mechanisms.

引用

页码：177 / 182

页数：6

共 25 条

[1] HYDROGEN-PEROXIDE AND HYDROXYL FREE-RADICAL PRODUCTION BY HEMATOPORPHYRIN DERIVATIVE, ASCORBATE AND LIGHT [J].