Kinetic Study of Free Radicals Scavenging by Saffron Petal Extracts

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 37˚c. furthermore, the pseudo first order rate constants were determined.