Abstract
Microwave-assisted extraction (MAE) is first used to extract baicalin from Scutellaria baicalensis extractive drug residue to study the value of Scutellaria baicalensis extractive drug residue. The content of baicalin in the Scutellaria baiacalensis extractive drug residue was determined by UV. Effects of different granularity sizes of its extractive drug residue, different microwave output power, duration of microwave irradiation and different concentration of ethanol on yield of baicalin were discussed. The results indicated that the microwave power was 500w, granularity of Scutellaria baicalensis extractive drug residue was 0.25mm, 30% ethanol was as solvent, duration of microwave irradiation was 3min.The yield of baicalin arrived 9~10%.The conclusion is that some active component such as Baicalin is still in Scutellaria baicalensis extractive drug residue, Scutellaria baicalensis extractive drug residue can be reused as resources again.
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