ISO 14502-1-2005 绿茶和红茶的物质特性测定.第1部分:茶中多酚的总含量.使用Folin-Ciocalteu试剂的比色法

　　

　　This part of ISO 14502 specifies a method for the determination of the total polyphenol content of leaf tea and instant tea by a colorimetric assay using Folin-Ciocalteu phenol reagent [4]. It is applicable to both green and black tea products.