Estimation of the antioxidant activity of flavonoids by isothermal chemiluminescence method

2008 
The correlation between the structural characteristics of some representative classes of flavonoids and their antioxidant activity was studied. A simple method based on isothermal CL measurements for estimating the antioxidant activity of flavonoids was used. The obtained results suggest that antioxidant activity depends both on substitution pattern of hydroxyl groups of the flavonoid skeleton and the presence of unsaturation at the C2 - C3 bond. Quercetin showed the highest antioxidant activity among tested compounds.The ability of some flavonoids to block organic peroxyl radicals was found to be comparable with butylhydroxytoluene (BHT).
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