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
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.
出处
《河南医科大学学报》
2000年第6期557-559,共3页
Journal of Henan Medical University
关键词
茶叶
咖啡因
提取
鉴定
含量分析
tea
caffeine
extraction
identification
content analysis
