SFC和GC/MS快速测定茶叶中咖啡因(英文)

Rapid Determination of Caffeine in Tea by SFC and GC/MS

采用超临界流体色谱和气-质联用分别测定茶叶中咖啡因,结果表明:(1)用CO2作流动相,加5%的CH3OH做改性剂,SFC所得结果令人满意,3min完成分析。(2)气-质联用测定7min完成。两个方法都可用于茶叶中咖啡因的快速分析,茶叶中共存的其它组分不干扰测定。

Chromatography (SFC) and GC/MS have been developed in this paper. The data showed (1) using a mobile phase of carbon dioxide modified with 5% methanol ,SFC achieved excellent result, and the time for the analysis was less than 3 minutes; (2) using GC/MS, the analysis was finished within 7 minutes. The two methods could be used to determine caffeine in tea rapidly. The other components contained in tea did not interfere the assay.