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

NORMA vydaná dňa 16.3.2005

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The information about the standard:

Designation standards: ISO 14502-2:2005
Publication date standards: 16.3.2005
The number of pages: 23
Approximate weight : 69 g (0.15 lbs)
Country: International technical standard
Kategória: Technické normy ISO

Annotation of standard text ISO 14502-2:2005 :

Description / Abstract: 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.