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茶叶中咖啡因的提取、鉴定和含量分析
Extraction , identification and content analysis of Caffeine from tea
【摘要】 目的 :从茶叶中提取咖啡因 ,并对咖啡因进行鉴定和含量分析。方法 :茶叶经体积分数为 30 %的丙酮水溶液提取 2次 ,后经正已烷萃取 2次 ,再加入硫酸钠 ,用氯仿萃取 2次 ,萃取液经浓缩干燥 ,制成咖啡因。结果 :产物经红外光谱鉴定分析为咖啡因 ,经紫外分光光度计测出在茶叶中含量为 3 .4%。结论 :从茶叶中提取咖啡因的新工艺切实可行
【Abstract】 Aim:To extract ,identify and analysis caffeine from tea. Methods:Tea was extracted by mixed solution , then the solution was extracted , and concentrated . The rough caffeine was prepared . Results:The production was identified by IR , UV . Through UV the content of caffeine in tea was 3.4%. Conclusion:The technological route that caffeine and tea polyphenol were extracted simultaneously is feasible.
【关键词】 茶叶;
咖啡因;
提取;
鉴定;
含量分析;
【Key words】 tea; caffeine; extraction; identification; content analys?;
【Key words】 tea; caffeine; extraction; identification; content analys?;
- 【文献出处】 河南医科大学学报 ,Journa of Henan Medical University , 编辑部邮箱 ,2000年06期
- 【分类号】R284.1;R284.2
- 【被引频次】15
- 【下载频次】2372