A comparison of methods employed to evaluate antioxidant capabilities

• DRUSO D PEREZ ^[1] ; FEDERICO LEIGHTON ^[1] ; ALEXIS ASPEE ^[1] ; CAROLINA ALIAGA ^[2] ; EDUARDO LISSI ^[2]
  1. [1] Catholic University of Chile
  2. [2] University of Santiago
• Localización: Biological Research, ISSN-e 0717-6287, ISSN 0716-9760, Vol. 33, Nº. 2, 2000, págs. 71-77
• Idioma: inglés
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• Resumen

  • Thrce ditferent methodologies frequently employed to evaluate the indexes that report the antioxidant capabilities of pure compounds and/or complex mixtures of antioxidants are applied to a series of mono- and polyphenols, as well as to two wine (red and white) samples. These methodologies are based on the bleaching of a stable radical, the effect of the additive upon luminol chemiluminescence induced by peroxyl radicals, and the effect of the additive upon the bleaching of the fluorescence from a dye molecule. Widely ditferent responses are obtained from the different methodologies. These differences are interpreted in terms of the different factors (stoichiametric factors and/or reactivities) that determines the indexes evaluated by these different methodologies