[Microwave-assisted extraction of flavonoids in Mulberry leaf and root-bark].

OBJECTIVE

To extract flavonoids in Mulberry leaf and White Mulberry root-bark by microuave-assisted method.

METHODS

An orthogonal table was used to find the best procedure for microwave-assisted extraction (MAE) of flavonoids. The advantages of MAE were explored by comparing with the commonly used extraction methods. The different contents of flavonoids in Mulberry Leaf and Mulberry Root-bark were also compared.

RESULTS

The best condition for procedure was extracting 20 min at 60 degrees C with 12 times of 70% ethanol. Among all factors, the ethanol concentration was significant This experiment implied that flavonoids in Mulberry leaf were 9 times as that in Mulberry Root-bark probably. Moreover, the flavonoids extracted from Mulberry Leaf and White Mulberry root-bark by MAE were 55% and 32% more than that from commonly used extraction method individually.

CONCLUSION

MAE is advantageous than commonly used extraction method. It can be used for batch production.