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Abstract. We evaluated the in vitro antioxidant capacity of polyphenols extracts, employing DPPH, FRAP, ABTS methods and ferrozina test for iron chelating capacity. As part of this study, we have determined the total content of phenols, flavonoids, polysaccharides and the influence of different factors on extraction efficacy.
Key words: Antioxidant activity, Centaurea cyanus L.
Introduction. Literature data indicate polyphenols and polysaccharides as the main secondary metabolites of Centaurea cyanus L. [1,2,3,4]. As interesting compounds, various flavonoids [2], phenyl carboxylic acids [3] derivates were found. These substances are responsible for the majority of the oxygen capacity in most plant-delivered products [5]. Some works also mention polysaccharides as being responsible for pharmacological activities of Centaurea cyanus L. The polysaccharides fraction from Cyani flores developed anti-inflammatory effects in several models of inflammation and anti-complementary activity in rat serum...