| 第 46 卷第 5 期 |  | Vol. 46 No. 5 | | 2016 年 10 月 | Oct 2016 |
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所屬欄目：分析與測試
從綠茶中提取咖啡因實(shí)驗方法的對比 |
| 楊莉莉，韋復華，張聲俊
（安順學(xué)院 化學(xué)化工學(xué)院，貴州 安順 561000） |
| 摘 要：將傳統索氏提取器換為恒壓漏斗，從茶葉中提取咖啡因。研究水、無(wú)水乙醇、氯仿和丙酮不同的溶劑對咖啡因提取效果的影響。結果表明，使用恒壓漏斗作為提取裝置，以無(wú)水乙醇作為提取劑時(shí)，咖啡因提取率達到1.82%，提取時(shí)間2~3 h。將提取得到的白色產(chǎn)品經(jīng)傅里葉紅外光譜測試，數據顯示，產(chǎn)品譜圖與標準譜圖一致。 |
| 關(guān)鍵詞：咖啡因；茶葉；溶劑；恒壓漏斗；索氏提取器 |
| 中圖分類(lèi)號：TQ914.1 文獻標識碼：A 文章編號：1009-9212（2016）05-0067-02 |
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| 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 |
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作者簡(jiǎn)介：楊莉莉（1963-），女，貴州貴陽(yáng)人，副教授，研究方向：有機化學(xué)。
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收稿日期：2016-06-30
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