Quality Standard for Compound Chaihu Tea / 医药导报

ABSTRACT

Objective To improve the quality standard of compound Chaihu tea. Methods Pupleuri Radix, Puerariae Lobatae Radix and Forsythiae Fructus were identified by thin layer chromatography (TLC).HPLC method was used to determine the content of puerarin.The determination was performed on a Shimadzu VP-ODS-C18column (250 mm×4.6 mm,5μm) with the mobile phase of methanol-0.2% H3PO4(2377).The flow rate was 1.0 mL·min-1, the column temperature was set at 30 ℃ and the detection wavelength was 250 nm. Results The TLC spots were clear and well-separated without negative interference.The good linear correlation existed within the range of 1.340 8-56.632 8μg· mL-1 for puerarin (r=0.999 9, n=6) and the average recovery was 102.98% with RSD being 1.48% (n=6). Conclusion The method is simple and accurate.It can be used for quality control of compound Chaihu tea.