茶叶中咖啡因的提取研究
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摘要
以黄山毛峰为原料,采用浸提法从茶叶中提取咖啡因。探讨了提取剂的种类、提取剂的加入量、提取时间、升华条件对咖啡因产品的收率的影响。研究结果表明,从茶叶中提取咖啡因最佳条件为:10g黄山毛峰,加入100mL乙醇提取2h,并用7g CaO的中和丹宁酸在184-186℃升华,最高收率为1.433%。
Caffeine was extracted from tea with Huangshan Maofeng as raw material.The effects of the type of extract,the amount of extract,the extraction time and the s-ublimation conditions on the yield of caffeine products were discussed.The research r-esults show that the best condition for extracting caffeine from tea:to 10 g huangshan maofeng tea as raw material to add in 100 mL of ethanol extraction of 2 h,and 7 g CaO neutralize tannin in 184-186 ℃ sublimation,the highest yield was 1.433%.
Caffeine was extracted from tea with Huangshan Maofeng as raw material.The effects of the type of extract,the amount of extract,the extraction time and the s-ublimation conditions on the yield of caffeine products were discussed.The research r-esults show that the best condition for extracting caffeine from tea:to 10 g huangshan maofeng tea as raw material to add in 100 mL of ethanol extraction of 2 h,and 7 g CaO neutralize tannin in 184-186 ℃ sublimation,the highest yield was 1.433%.
引文
[1]郭叶,郝鹤.从茶叶中提取咖啡因实验改进[J].包头医学院报.2017,33(4):111-112,118.
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[3]李东芳,吴亚丽,李强,等.“从茶叶中提取咖啡因”实验中影响咖啡因产量的主要因素[J].教育教学论坛.2017,(6):268-269.
[4]韩亭亭,祁玥,王立宁.从茶叶中提取咖啡因的实验研究进展[J].广州化工.2017,45(2):28-30.
[5]李静,王惠泽,刘艳红,等.茶叶中提取咖啡因实验教学改革探索与实践[J].实验技术与管理.2015,32(1):54-56,60.
[2]马媛媛.在茶叶成份中提取咖啡因的实验方法及改进[J].科技展望.2015,25(11):77.
[3]李东芳,吴亚丽,李强,等.“从茶叶中提取咖啡因”实验中影响咖啡因产量的主要因素[J].教育教学论坛.2017,(6):268-269.
[4]韩亭亭,祁玥,王立宁.从茶叶中提取咖啡因的实验研究进展[J].广州化工.2017,45(2):28-30.
[5]李静,王惠泽,刘艳红,等.茶叶中提取咖啡因实验教学改革探索与实践[J].实验技术与管理.2015,32(1):54-56,60.