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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

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Kehtiv alates 16.03.2005
Tegevusala (ICS grupid)
67.140.10 Tee
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Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
24.03.2006
Parandus
16.03.2005
Põhitekst
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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