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ISO 18447:2021

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

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.

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Related Information

Similar Standards

  • BS 5987:1980

    Methods for sampling tea

  • BS 6049-1:1981

    Methods of test for tea, Preparation of ground sample of known dry matter content

  • BS 6049-2:1981

    Methods of test for tea, Determination of loss in mass at 103°C

  • BS 6049-3:1994

    Methods of test for tea, Determination of water extract

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ISO 18447:2021

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