Gallic acid (Sigma Chemical Co., USA) was applied as a standard, and the results were expressed as mg gallic acid equivalent (GAE)/g WGP at absorbance of 765 nm using a spectrometer (UV160U, Shimadzu, Japan).
Gallic acid (Sigma ChemicalCo., USA) was applied as a standard, and the results were expressedas mg gallic acid equivalent (GAE)/g WGP at absorbance of 765 nmusing a spectrometer (UV160U, Shimadzu, Japan).