Kinetic Study of Free Radicals Scavenging by Saffron Petal Extracts

Subject Areas : Journal of Chemical Health Risks

T.  Ardalan ¹ ()
P.  Ardalan ² ()
M. M.  Heravi ³ ()

Received: 2013-02-11 Accepted : 2018-10-29 Published : 2012-12-01

Keywords: DPPH, Antioxidant, Kinetic study, saffron petal,

Abstract :

Saffron petal is the main by-product of saffron processing which is produced in large amounts, annually. The objectives of this study were to study the antioxidant activity and free radical-scavenging effects of saffron petal extracts. The ability of saffron petal to act as an antioxidant using the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free-radical method was investigated by applying the Uv–Vis spectrometry. The Uv–Vis spectra of reaction mixtures in acetonitrile revealed that saffron petal has a considerable effect on scavenging free radical. Kinetic studies were conducted by measuring the disappearance of DPPH in acetonitrile over the wavelength range of 515-522 nm under pseudo-first-order conditions at 37oC. Furthermore, the pseudo first order rate constants were determined

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