茶叶中咖啡因的超临界流体色谱分析

Determination of Caffeine in Teas by Supercritical Fluid Chromatography

用超临界流体色谱法 (SFC)测定茶叶中的咖啡因 ,在二氧化碳流动相中加入体积分数为 5 %的甲醇后 ,得到了良好的分离效果。该方法具有样品前处理简单 ,共存组分不干扰测定 ,分析速度快等优点 ,可以用于茶叶中咖啡因的快速分析。

A rapid supercritical fluid chromatographic method for the determination of caffeine in tea is described It is shown that a mobile phase of carbon dioxide, modified with 5% methanol achieved excellent results The method is simple in the sample preparation. Other components contained in the sample do not interfere the measurement. It can be used to determine caffeine in tea rapidly