Content of hydroxycinnamic and hydroxybenzoic acids in alcohol extracts of fruits and berries and their radical scavenging activity
2006
Ivanova, R. | Casian, I.
The content of caffeic, chlorogenic, ferulic, salicylic, protocatechuic, and gallic acids in alchool extracts of red and black currents, bird cerries, mahonias, hawthorns, rowanberries, black chokeberries, nanking cherries and hips was investigated by HPLC method. The radical scavenging activity of standard acids may be presented in the following decreasing sequence: gallic-caffeic-protocatechuic-chlorogenic-ferulic. All tested extracts possessed radical scavenging properties. A reliable positive correlation was revealed between antiradical activity and both total polyphenolic and gallic acid content; whereas the correlation between the amount of chlorogenic acid and antioxidant properties of the extracts had a negative value (the Pearson correlation was equal to r=-0,2608). This may be explained by the fact that the antioxidants of phenolic nature may exert both synergetic and antagonist actions to one another.
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