Published
This document specifies a high performance liquid chromatography (HPLC) or ultra-high performance liquid chromatography (UHPLC) method for the determination of content of the four major theaflavins of tea.
It is applicable to both leaf and instant black and oolong teas. The method is currently not validated for ready-to-drink (RTD) beverages.
PUBLISHED
ISO 18447:2021
60.60
Standard published
Jun 10, 2021
Tea — Determination of theaflavins in black tea — Method using high performance liquid chromatography
40.20 DIS ballot initiated: 12 weeks