DIN ISO 14502-1:2007 绿茶和红茶的物质特征的测定.第1部分:茶中多酚的总含量.使用Folin-Ciocalteu试剂的比色法
Determination of substances characteristic of green and black tea - Part 1: Content of total polyphenols in tea - Colorimetric method using Folin-Ciocalteu reagent (ISO 14502-1:2005 + Corrigendum 1:2006)