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ISO 14502-2:2005

Determination of substances characteristic of green and black tea — Part 2: Content of catechins in green tea — Method using high-performance liquid chromatography
16 mar 2005

General information

90.93     26 sht 2025

ISO

ISO/TC 34/SC 8

International Standard

67.140.10  

anglisht  

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Scope

ISO 14502-2:2005 specifies a high-performance liquid chromatographic (HPLC) method for the determination of the total catechin content of tea from the summation of the individual catechins. It is applicable to both leaf and instant green tea, and with precision limitations to black tea.
Gallic acid and caffeine can also be determined by this method, as can theogallin and theaflavins.

Life cycle

NOW

PUBLISHED
ISO 14502-2:2005
90.93 Standard confirmed
26 sht 2025

CORRIGENDA / AMENDMENTS

PUBLISHED
ISO 14502-2:2005/Cor 1:2006