ISO 14502-2:2005現行
Determination of substances characteristic of green and black tea Part 2: Content of catechins in green tea - Method using high-performance liquid chromatography
出版：International Organization for Standardization
專家解讀視頻
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.
NEN ISO 14502-2:2005 - Identical
DIN ISO 14502-2 (2007-12) - Identical
BS ISO 14502-2:2005 - Identical
GB/T 21727-2008 - Modified
GOST ISO 14502-2:2015 - Identical
