ISO 14502-2:2005/Cor 1:2006
Determination of substances characteristic of green and black tea — Part 2: Content of catechins in green tea — Method using high-performance liquid chromatography — Technical Corrigendum 1
发布时间:2006-03-24 实施时间:


绿茶是一种常见的饮品,具有多种保健功效。其中,儿茶素是绿茶中的一种重要成分,具有抗氧化、抗癌等作用。因此,测定绿茶中儿茶素的含量对于评估绿茶的品质和功效具有重要意义。

ISO 14502-2:2005/Cor 1:2006是一项关于绿茶中儿茶素含量的测定方法的技术修正标准。该标准采用高效液相色谱法,用于测定绿茶中儿茶素的含量。该标准的测定方法具有准确、可靠、重复性好等特点,已成为绿茶中儿茶素含量测定的国际标准方法。

该标准的测定方法主要包括样品制备、色谱条件、检测条件等方面。具体来说,样品制备包括绿茶样品的粉碎、提取和过滤等步骤;色谱条件包括色谱柱、流动相、梯度洗脱等参数的设置;检测条件包括检测波长、进样量、流速等参数的设置。通过严格控制这些参数,可以获得准确、可靠的绿茶中儿茶素含量测定结果。

需要注意的是,该标准适用于绿茶中儿茶素的测定,但不适用于其他茶叶中儿茶素的测定。此外,该标准还规定了一些质量控制要求,如样品的重复性、准确性等,以确保测定结果的可靠性。

相关标准
ISO 14502-1:2005 Determination of substances characteristic of green and black tea — Part 1: Content of total polyphenols in tea — Colorimetric method using Folin-Ciocalteu reagent
ISO 14502-3:2005 Determination of substances characteristic of green and black tea — Part 3: Content of catechins in green tea — Method using high-performance liquid chromatography with diode array and mass spectrometric detection
ISO 14502-4:2005 Determination of substances characteristic of green and black tea — Part 4: Content of theobromine, theophylline and caffeine in tea — Method using high-performance liquid chromatography (HPLC)
ISO 14502-5:2005 Determination of substances characteristic of green and black tea — Part 5: Content of catechins in green tea — Method using high-performance liquid chromatography with coulometric array detection (HPLC-CAD)
ISO 14502-6:2007 Determination of substances characteristic of green and black tea — Part 6: Content of water-soluble vitamins in tea — Method using high-performance liquid chromatography (HPLC)