Tea — Determination of theaflavins in black tea — Method using high performance liquid chromatography
NORMA vydaná dňa 10.6.2021
Označenie normy: ISO 18447:2021
Dátum vydania normy: 10.6.2021
Počet strán: 19
Približná hmotnosť: 57 g (0.13 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: 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.