第 46 卷第 5 期 Vol. 46 No. 5 2016 年 10 月 Oct 2016

所属栏目：分析与测试 从绿茶中提取咖啡因实验方法的对比

杨莉莉，韦复华，张声俊 （安顺学院 化学化工学院，贵州 安顺 561000）

摘　要：将传统索氏提取器换为恒压漏斗，从茶叶中提取咖啡因。研究水、无水乙醇、氯仿和丙酮不同的溶剂对咖啡因提取效果的影响。结果表明，使用恒压漏斗作为提取装置，以无水乙醇作为提取剂时，咖啡因提取率达到1.82%，提取时间2~3 h。将提取得到的白色产品经傅里叶红外光谱测试，数据显示，产品谱图与标准谱图一致。

关键词：咖啡因；茶叶；溶剂；恒压漏斗；索氏提取器

中图分类号：TQ914.1　　文献标识码：A　　文章编号：1009-9212（2016）05-0067-02

Comparison of Experimental Methods for Extracting Caffeine from Green Tea

YANG Li-li, WEI Fu-hua, ZHANG Sheng-jun (College of Chemistry and Chemical Engineering, Anshun University, Anshun 561000, China)

Abstract：In a common extraction method a Soxhlet extractor with water, alcohol, chloroform and acetone as solvents was used. In this paper, we attempted to use a constant voltage funnel as an extractor instead of a Soxhlet extractor, and to study its effect on the extraction efficiency of caffeine with different extracting agents. The results showed that the extraction efficiency of caffeine was up to 1.82% when using a constant voltage funnel and ethanol as the solvent. At the same time, the extraction duration was also dramatically shortened. The FT-IR spectra of the white extracting product was consisted with that of the standard caffeine.

Key words：caffeine; tea; solvent; constant voltage funnel; Soxhlet extractor

作者简介：杨莉莉（1963-），女，贵州贵阳人，副教授，研究方向：有机化学。

收稿日期：2016-06-30