Investigation on the Extraction Techniques for Qing'e Granules

Objective To optimize the extraction techniques for qing 'e granules. Methods Extraction rate and contents of pinoresinol diglucoside,psoralen and isopsoralen were used as investigation indexes. The optimum extraction conditions were studied with the orthogonal test of L9(34). Results The optimum extraction conditions were A2B1C2D3,i. e. ten times volume of 70% alcohol was added each time,and heated for extraction for 2h at each time for three times,and alcohol was recycled by decompressed concentration. Conclusion The extraction technique is rational and the extraction rate of active components is high,which provides a experiment basis for further preparation research and clinical application of qing'e granules.