kinetic study of dpph scavenging in the presence of mixture of zinc and vitamin c as an antioxidant
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2012
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Abstract
Reactions of free radicals and reactive oxygen species (ROS) with biological molecules in vivo play an important physiological role in many diseases. 2,2-diphenyl-1-picrylhydrazyl (DPPH) is a stable free radical and often used as a routine reagent to evaluate the antioxidant capacity of an antioxidant. This study was undertaken to investigate the free radical-scavenging and antioxidant activities of Zinc, Vitamin C and mixture of them. UV-Vis spectrophotometry method was used to evaluate the ability of Zinc, Vitamin C and mixture of them to scavenge DPPH radical. The kinetic parameters such as rate constant and activation energy in experimental conditions were calculated. The rate constants of the H atom abstraction by DPPH (), in the presence of Zinc, Vitamin C and mixture of them were obtained (0.4209, 2.092 and 1.82 min-1) respectively, under pseudo-first-order conditions at 25 oC.| Reference Key |
heravi2012journalkinetic
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| Authors | ;M. Momen Heravi;B. Haghi;A. Morsali;P. Ardalan;T. Ardalan |
| Journal | ege eğitim dergisi |
| Year | 2012 |
| DOI | DOI not found |
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