2.7. Determination of total phenolic content (TPC) The total polyphenol contents (TPC) of the extracts, permeates and concentrates were determined following a modified Folin–Ciocalteu procedure (Singleton and Rossi, 1965).
2.7. Determination of total phenolic content (TPC)The total polyphenol contents (TPC) of the extracts, permeatesand concentrates were determined following amodified Folin–Ciocalteu procedure (Singleton and Rossi,1965).