Lingyun Baekho tea with caffeine 4.91 % , 3.63 % amino acids, tea polyphenols 35.6 %.

凌云白毫茶含咖啡碱4.91%, 氨基酸3.63%, 茶多酚35.6%.

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Through 2 - Stepwise elution chromatography , tea polyphenols ( Tp ) and caffeine were separated from tea with macroporous resin.

茶叶提取液经大孔吸附树脂二级阶段洗脱 层析分离 茶多酚咖啡碱.

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In 1838 , it was that theine, a substance in tea, was identical to caffeine.

1838年 发现茶中的一种物质叫咖啡碱与咖啡因有相同的效用.

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The main methods of extracting caffeine are solvent, sublimation, adsorption and supercritical fluid extraction.

咖啡碱的单一提取方法主要有溶剂法 、 华法 、 附法和超临界二氧化碳萃取法4类.

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Tea was picked out to determine content of acid , tea polyphenol, caffeine, soluble sugar of leaves.

试验测定分析了茶多酚、氨基酸 、 咖啡碱和可溶性糖等主要茶叶品质指标.

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The effect of caffeine concentration on the turbidity of instant tea liquor was studied.

研究了速溶茶茶液浊度与咖啡碱含量的关系.

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