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茶叶科学 ›› 2012, Vol. 32 ›› Issue (4): 313-318.doi: 10.13305/j.cnki.jts.2012.04.005

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茶叶中EGCG3"Me和EGCG4"Me的分离制备与鉴定

李银花, 张盛, 黄建安, 刘仲华*   

  1. 国家植物功能成分利用工程技术研究中心,湖南农业大学茶学教育部重点实验室,湖南 长沙,410128
  • 收稿日期:2012-03-30 修回日期:2012-05-09 出版日期:2012-08-15 发布日期:2019-09-05
  • 通讯作者: larkin-liu@163.com
  • 作者简介:李银花(1977— ),女,实验师,主要从事植物功能成分分离纯化与分析检测研究。
  • 基金资助:
    国家自然科学基金(31100501)和湖南农业大学青年基金(11QN10)

Isolation and Identification of EGCG3″Me and EGCG4″Me from Tea

LI Yin-hua, ZHANG Sheng, HUANG Jian-an, LIU Zhong-hua*   

  1. National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Key Laboratory of Tea Science, Ministry of Education, Hunan Agricultural University, Changsha 410128, China
  • Received:2012-03-30 Revised:2012-05-09 Online:2012-08-15 Published:2019-09-05

摘要: 采用柱色谱和高效制备液相色谱法从茶叶中分离制备2种甲基化EGCG(EGCG 3"Me和EGCG 4"Me)。用含水的乙酸乙酯提取茶叶,粗提液浓缩后经HP-20柱色谱分离,再经制备液相色谱分离,以水和乙腈为流动相进行梯度洗脱得到2种甲基化EGCG。经紫外光谱、核磁共振及质谱分析,进一步确定2种甲基化EGCG分别为EGCG3"Me和EGCG4"Me。所制备的2种甲基化EGCG的纯度在98%以上。

关键词: EGCG3"Me, EGCG4"Me, 分离制备, 茶叶

Abstract: :A method was established to isolate EGCG3"Me and EGCG 4"Me by using column chromatography and preparative high performance liquid chromatography. Crude extracts was obtained from tea leaves by using ethyl acetate and water as solvent .Then the concentracted crude extract was separated on a HP-20 column. The Fr-1 fraction was obtained from the eluate of 80% ethanol and subjected to a preparative high performance liquid chromatography for isolation of target components by using water-acetonitrile as mobile phase. Two compounds were identified with ultraviolet absorbance(UV), nuclear magnetic resonance(NMR), mass spectrometry(MS). They were EGCG3"Me and EGCG4"Me.The purity of them was more than 98%.

Key words: EGCG3"Me, EGCG4"Me, isolation and preparation, tea

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