【摘要】 以实验室低档绿茶茶叶末为原料,从中提取脂溶性茶色素。脂溶性茶色素易溶于有机溶剂,采用溶剂浸提的方法,用无水乙醇、乙酸乙酯、无水乙醚、三氯甲烷和四氯化碳五种有机溶剂为提取剂提取,通过可见分光光度计测得吸光度,由吸光度值的大小比较提取效果,结果表明三氯甲烷提取效果最好。在三氯甲烷基础上,分别在不同时间和温度以及固液比浸提,结果表明:提取剂为三氯甲烷,浸提温度为45℃,浸提时间为30 min,固液比为1 g:15 mL时,提取效果最佳。更多还原

【Abstract】 Fat soluble tea pigment was extracted from low-grade green tea powder as raw materials,which was soluble in organic solvents.Solution extraction method was adopted,five kinds of organic solvent were chose as extraction agents,such as absolute alcohol,ethyl acetate,ethyl-ether,chloroform and carbon tetrachloride,and the absorbance from visible spectrophotometer measure absorbency was compared with the extraction effect.As a result,chloroform extraction had the best effect.Based on the chloroform,respectively adopt different time and temperature and ratio of solid to liquid were chose to extract.The results showed that chloroform as extraction agents,under 45 ℃,for 30 min,and the ratio of solid to liquid for 1 g:15 mL,it had the best extraction effect.更多还原