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.
标准类别 | 国际标准 | 发布日期 | 2005-03 |
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标准状态 | 现行有效 (标准状态仅供参考) | 实施日期 | |
颁发部门 | IX-ISO | 废止日期 |