食品科学 ›› 2003, Vol. 24 ›› Issue (4): 114-116.

• 分析检测 • 上一篇    下一篇

儿茶素的分析比较研究

 何强, 吕远平, 姚开, 曾凡俊, 林龙辉   

  1. 四川大学轻纺与食品学院,四川省飞龙新技术企业公司
  • 出版日期:2003-04-15 发布日期:2011-12-13

Study on Determination of Catechins

 HE  Qiang, LU Yuan-Ping , YAO  Kai, ZENG  Fan-Jun, LIN  Long-Hui   

  • Online:2003-04-15 Published:2011-12-13

摘要: 本文首先研究了采用不同标样儿茶素(C),表儿茶素(EC)和没食子儿茶素没食子酸酯(EGCG)对样品茶多酚中总儿茶素含量分光光度法测定带来的影响,其测定结果儿茶素纯度分别为51.98%,49.59%和82.39%,相对标准偏差分别为0.65%,1.79%和2.28%,回收率分别为94.19%,93.46%和102.4%。结果表明使用异构体C和EC作标样测定结果相近,而采用分子量较大的EGCG作标样时结果偏高。最后本文采用高效液相色谱法(HPLC)对样品茶多酚进行了定性定量研究,结果表明C、EC、EGC(表没食子儿茶素)、ECG(表儿茶素没食子酸酯)和EGCG等五种儿茶素单体的含量分别为5.05%、10.38%、25.96%、1.98%和10.18%,总儿茶素含量为53.5%,其测定结果与分光光度法(以C为标样)所测结果相一致。

关键词: 儿茶素, 分光光度法, 高效液相色谱法, 含量测定

Abstract: To determinate the catechins content of tea sample, three catech in s catechin(C), epicatechin(EC) and epigallocatechin gallate (EGCG) were used as standard samples, respectively. As the result, the catechins purities of tea pol yphenol with different standard sample was 51.98%, 49.59% and 82.39%, the re lative standard (RSD) were 0.65%, 1.79% and 2.28%, the average recoveries we re 94.19%, 93.46% and 102.4%, respectively. To compared with the ultraviolet spectrophotometric method, HPLC was used to identify and determinate the tea c a techins and C, EC, EGC, ECG and EGCG were successfully separated. The result s ho wed that the purity of each was 5.05%, 10.38%, 25.96%, 1.98% and 10.18%, r espectively. The whole catechins purity of tea polyphenol sample was 53.5% w hi ch was in agreement with that of UV method (catechin was the standard sample).

Key words: catechin, UV, HPLC, determination