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Determination of substances characteristic of green and black tea. Content of total polyphenols in tea. Color…

Determination of substances characteristic of green and black tea — Part 1: Content of total polyphenols in t…

Overview ISO 14502-1:2005 defines a validated colorimetric method using Folin‑Ciocalteu reagent for the determination of the total polyphenol content in green and black teas, including leaf teas and…