食品科学 ›› 2004, Vol. 25 ›› Issue (6): 147-149.

• 分析检测 • 上一篇    下一篇

微柱高效液相色谱法测定茶多酚的研究

 胡秋芬, 李德良, 李海涛, 杨光宇, 尹家元   

  1. 玉溪师范学院化学系,云南大学化学系
  • 出版日期:2004-06-15 发布日期:2011-10-24

Study on Microcolumn High Performance Liquid Chromatography Method for the Determination of Tea Polyphenols

 HU  Qiu-Fen, LI  De-Liang, LI  Hai-Tao, YANG  Guang-Yu, YIN  Jia-Yuan   

  1. 1.Department of Chemistry,Yuxi Normal College;2.Department of Chemistry,Yunnan University
  • Online:2004-06-15 Published:2011-10-24

摘要: 研究了用固相萃取预分离,微柱高效液相色谱法测定茶叶中多酚的方法。茶叶中的多酚用80%乙醇超声震荡萃取,提取液用C18固相萃取小柱预分离,以WatersXterraTMRP18(1.0×50mm,2.5μm)色谱为固定相,1%的醋酸和甲醇梯度洗脱为流动相,在该条件下茶叶中主要的多酚在3.0min内可达到基线分离;用紫外二极管矩阵检测器检测,方法标准回收率为95%~103%,相对标准偏差为1.2%~1.6%。用该方法测定了几种茶叶样品中的多酚,结果令人满意。

关键词: 微柱高效液相色谱, 多酚, 茶叶

Abstract: A microcolumn high performance liquid chromatography method for the determination of tea polyphenols wasstudied. Tea polyphenols was extracted from the tea leaf with 80% of ethanol by ultrasonic extraction at 50℃, then purified bysolid phase extraction with Sep-Pak-C18 cartridge. The tea polyphenols can be separated on a Waters XterraTM RP18 (1.0×50mm,2.5μm) microcolumn, with methanol and 1% acetic acid solution gradient elution as mobile phase at a flow-rate of 0.2ml/min, andmonitored with photodiode array detector at 200~400nm. The recovery of tea polyphenols is 95%~103%, and relative standarddeviation is 1.22%~1.6%. This method can be applied to the determination of tea polyphenols in tea with good result.

Key words: high performance liquid chromatography, tea polyphenols, tea leaf