茶叶中的超临界流体色谱分析

摘要：用超临界流体色谱法(SFC)测定茶叶中的，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，可以用于茶叶中的快速分析 关键词：超临界流体色谱；茶叶； 中图分类号：0658 文献标识码：A 文章编号：10008713(2002)01007503 Determination of Caffeine in Teas by Supercritical Fluid Chromatography GU0 Ya-dong (Department ofPharmacy，KunrningMedical College，Kunming650031，Ehirm) Abstract：A rapid supercridcal fluid chromatog raphic method for the determination of caffeine in tea is described．It is shown that a mobile phase of carbon dioxide，mod[fied with 5％ methanol achieved exedlent results．Themethodis simpleinthe samplepreparation．Othermmponents containedinthe sample do not interfere the measurement It can ha used to determ ine caffeine in tea rapidly． Key words：supercritical flu{d chromatography；tea；caffeine 固相萃取小柱