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The antioxidant capacity of complex mixtures by kinetic analysis of crocin bleaching inhibition

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Journal of the American Oil Chemists’ Society

Abstract

The capability of a compound or of a mixture of compounds to quench peroxyl radicals was measured by analyzing the kinetics of the competition of a parallel reaction where peroxyl radicals bleach the carotenoid crocin. This kinetic approach, originally described for the analysis of antioxidants reacting with hydroxyl radicals in water, was modified by both decreasing the polarity of the solvent, thus allowing the analysis of lipophilic compounds, and by substituting a source of peroxyl radicals for the hydroxyl radical generating system. Single compounds as well as complex mixtures were analyzed by kinetic data processing. Overall antioxidant capacity, relative to that of α-tocopherol or of its soluble analog Trolox C, was calculated. As examples of the use of this test, the antioxidant capacities of a crude rosemary extract, Maillard reaction products, and virgin olive oils were measured.

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Tubaro, F., Micossi, E. & Ursini, F. The antioxidant capacity of complex mixtures by kinetic analysis of crocin bleaching inhibition. J Am Oil Chem Soc 73, 173–179 (1996). https://doi.org/10.1007/BF02523891

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  • DOI: https://doi.org/10.1007/BF02523891

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