標(biāo)準(zhǔn)號：ISO 14502-2-2005
中文標(biāo)準(zhǔn)名稱：綠茶和紅茶的物質(zhì)特性測定.第2部分:綠茶中兒茶酚含量.高效液相色譜法
英文標(biāo)準(zhǔn)名稱：Determination of substances characteristic of green and black tea - Part 2: Content of catechins in green tea - Method using high-performance liquid chromatography
標(biāo)準(zhǔn)類型：X55
發(fā)布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標(biāo)準(zhǔn)分類號：X55
國際標(biāo)準(zhǔn)分類號：67.140.10
適用范圍：This part of ISO 14502 specifies a high-performance liquid chromatographic (HPLC) method for thedetermination of the total catechin content of tea from the summation of the individual catechins. It isapplicable to both leaf and instant green tea, and with precision limitations to black tea (see Annex A).Gallic acid and caffeine can also be determined by this method, as can theogallin and theaflavins.