食品科学 ›› 2011, Vol. 32 ›› Issue (18): 214-217.doi: 10.7506/spkx1002-6630-201118046

• 分析检测 • 上一篇    下一篇

高效液相色谱法同时测定茶叶中8种儿茶素、3种嘌呤碱和没食子酸

李银花,李 娟,龚 雪,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
  • 出版日期:2011-09-25 发布日期:2011-09-24
  • 基金资助:
    湖南省重大科技专项(07FJ1005)

Simultaneous Determination of Eight Catechins, Three Purine Alkaloids and Gallic Acid in Tea by High-performance Liquid Chromatography

LI Yin-hua,LI Juan,GONG Xue,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)
  • Online:2011-09-25 Published:2011-09-24

摘要: 建立高效液相色谱同时测定茶叶中8种儿茶素(EGC、DL-C、EC、EGCG、GCG、EGCG4O`Me、EGCG3O`Me、ECG)、3种生物碱(茶碱、可可碱、咖啡碱)和没食子酸的方法。色谱条件为Welchrom C18(250mm×4.6mm,5μm)色谱柱、磷酸缓冲液-乙腈溶液为流动相、梯度洗脱、波长278nm、流速1.0mL/min、柱温30℃。采用此方法,茶叶中各种成分都能达到基线分离的效果,线性关系良好,具有良好的稳定性和准确度。

关键词: 高效液相色谱, 儿茶素, 甲基化EGCG, 嘌呤碱, 没食子酸

Abstract: A method was developed to determine catechins, purine alkaloids and gallic acid in tea by HPLC-PDA. The optimum condition was achieved by separation on a Welchrom C18 column kept at 30 ℃ using phosphate buffer-acetonitrile as the mobile phase at a flow rate of 1.0 mL/min through gradient elution and detection at 278 nm. This method showed a good linearity for all 12 tested compounds. The results demonstrated high accuracy and stability of this method.

Key words: high performance liquid chromatography (HPLC), catechin, methylated EGCG, purine alkaloid, gallic acid

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