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一种制备儿茶素的方法包括:(1)用低级醇水溶液从植物提取儿茶素,(2)用硅胶珠吸附提取物,(3)用水清洗吸附了提取物的硅胶珠,(4)用低浓度低级醇除去吸附于硅胶的提取物中的杂质,(5)用高浓度的乙醇液分离吸附于硅胶的儿茶素。最好选茶Camellia sinensis(Ⅱ)、C.sinen-sis var.sinensis、普洱茶C.sinensis var.assani-ca等和含有儿茶素的茶属植物及其混种的植物叶片或植物的其它部分。该法可有效地大规模地从Ⅱ中制备儿茶素,儿茶素中不含诸如咖啡因类的物质,能用
A method for preparing catechins includes: (1) extracting catechins from plants using a lower alcohol aqueous solution, (2) adsorbing extracts with silica gel beads, (3) washing the silica beads adsorbing the extracts with water, (4) The impurities adsorbed on the silica gel are removed with a low concentration of lower alcohol, and (5) the catechins adsorbed on the silica gel are separated with a high concentration of ethanol. It is best to select Camellia sinensis (II), C. sinen-sis var. sinensis, C. sinensis var. sinensis, etc., and plant cultivars of tea genus containing catechins and other plant leaves or plants. section. This method is effective for large-scale preparation of catechins from II. Catechin does not contain substances such as caffeine and can be used.