1, in the acacia rice in rutin content is high, so after hot water extraction of the main component is rutin. And the impurities in acacia rice are less in hot water.

2, in the extraction of rutin after a step of purification, but not the use of the concentration of separation, but the use of hot water to dissolve, cooling precipitation method, so most of the impurities will be in the liquid, and filtering to get the rutin solid will be more pure.

3, in the purification, can also be used in methanol dissolution and then purification method, so you can get rutin fine.