Total polyphenol content
The total polyphenol content was calculated using the
FC reagent and Na2CO3 10%; ulterior the maximum
absorption was evaluated by the obtained coloration, in
relation to the calibration curve. The total content of
phenolic compounds was evaluated using colorimetry
based on the chemical reduction of the mixture of tungsten
and molybdenum oxides to form a blue product
that absorbs strongly at 760 nm.