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Momen Heravi, M., Haghi, B., Morsali, A., Ardalan, P., Ardalan, T. (2012). Kinetic study of DPPH scavenging in the presence of mixture of Zinc and Vitamin C as an antioxidant. Journal of Chemical Health Risks, 2(2), -. doi: 10.22034/jchr.2012.543994
M. Momen Heravi; B. Haghi; A. Morsali; P. Ardalan; T. Ardalan. "Kinetic study of DPPH scavenging in the presence of mixture of Zinc and Vitamin C as an antioxidant". Journal of Chemical Health Risks, 2, 2, 2012, -. doi: 10.22034/jchr.2012.543994
Momen Heravi, M., Haghi, B., Morsali, A., Ardalan, P., Ardalan, T. (2012). 'Kinetic study of DPPH scavenging in the presence of mixture of Zinc and Vitamin C as an antioxidant', Journal of Chemical Health Risks, 2(2), pp. -. doi: 10.22034/jchr.2012.543994
Momen Heravi, M., Haghi, B., Morsali, A., Ardalan, P., Ardalan, T. Kinetic study of DPPH scavenging in the presence of mixture of Zinc and Vitamin C as an antioxidant. Journal of Chemical Health Risks, 2012; 2(2): -. doi: 10.22034/jchr.2012.543994

Kinetic study of DPPH scavenging in the presence of mixture of Zinc and Vitamin C as an antioxidant

Article 6, Volume 2, Issue 2, Summer 2012  XML PDF (390.28 K)
DOI: 10.22034/jchr.2012.543994
Authors
M. Momen Heravi email 1; B. Haghi1; A. Morsali1; P. Ardalan2; T. Ardalan2
1Department of Chemistry, Islamic Azad University, Mashhad Branch, Mashhad, Iran
2Department of Chemistry, Islamic Azad University, Mashhad Branch, Mashhad, Iran, young researcher club
Receive Date: 06 August 2012,  Revise Date: 17 September 2019,  Accept Date: 29 October 2018 
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.
Keywords
Antioxidant; DPPH; kinetic; Free radical; UV-Vis spectrometry
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