Study on Procedure of Guipi Oral Liquid (Radix Codonopsis Pilosulae, Rhizoma Atractylodis Macroephalae. etc.) / 中成药

Three different procedures of Guipi Oral Liquid have been studied. By comparison of TLC spots of n-buranol and n-hexane extracts from the sample and the UV absorption spectrum of the main component, ferulic acid, the rational production process was developed, which provides an experimental base for preparation improvement.