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ISO 18447:2021

Tea — Determination of theaflavins in black tea — Method using high performance liquid chromatography

Jun 10, 2021

General information

90.20     Apr 15, 2026

ISO

ISO/TC 34/SC 8

International Standard

67.140.10  

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Scope

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.

Life cycle

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PUBLISHED
ISO 18447:2021
90.20 Standard under periodical review
Apr 15, 2026

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