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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

General information

Valid from 16.03.2005
ICS Groups
67.140.10 Tea
Directives or regulations
None

Standard history

Status
Date
Type
Name
24.03.2006
Corrigendum
16.03.2005
Main
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.

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Standard monitoring