Study on extraction process of NongBai Mixture

Objective To optimize the extraction process of NongBai Mixture.Methods The preparation process was investigated by L9(34)orthogonal design with content of ephedrine hydrochloride and pseudoephedrine hydrochloride as indexes.The main factors influencing the extraction efficiency such as the time of soak,the amount of added water,the frequency of extraction and the time of decoction.Results The optimum technical condition was as follows:extract 2 times,0.5 h for time of soak,6 time amount of water and 3 h for each time.Conclusion The extracting process is reasonable and practicable,and has a good economical benefit.