
Determination of substances characteristic of green and black tea Part 1: Content of total polyphenols in tea - Colorimetric method using Folin-Ciocalteu reagent
出版:International Organization for Standardization

专家解读视频
ISO 14502-1:2005 specifies a method for the determination of the total polyphenol content of leaf teas and instant teas by a colorimetric assay using Folin-Ciocalteu phenol reagent. It is applicable to both green and black tea products.
NEN ISO 14502-1:2005 - Identical
DIN ISO 14502-1 (2007-11) - Identical
BS ISO 14502-1:2005 - Identical