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槐米中主要成分是芦丁。从槐米中提取芦丁可用乙醇提取法、水提取法、碱溶酸沉提取法。按1995年版《中国药典》要求．槐米中芦丁含量不得少于20．0％。碱溶酸沉提取法是依据芦丁结构中有4个游离的酸羟基，显弱酸性，遇碱成盐溶解．加酸又游离析出的原理设计的，此法成本低、收
The main ingredient in glutinous rice is rutin. The extraction of rutin from glutinous rice can be carried out by an ethanol extraction method, a water extraction method, and an alkali-soluble acid-salt extraction method. According to the 1995 edition of the “Chinese Pharmacopoeia” requirements. The content of rutin in glutinous rice should not be less than 20.0%. Alkali dissolved acid precipitation method is based on rutin structure has 4 free acid hydroxyl, obviously acidic, the case of alkali dissolved salt. The principle of acid addition and precipitation is designed. This method is of low cost and low cost.