Study on determination method of menthone and pulegone in Herba Schizonepetae / 中华中医药杂志

Objective: To establish a method for determination of methone and pulegone in Herba Schizonepetae. Methods: The contents of menthone and pulegone were determined by GC (equipped with FID) with HP-5 fused capillary column (5% phenyl methyl siloxane 30m?0.32mm?0.25?m) after the samples were extracted by the solvents. Results: The linear ranges were 0.002-5.0g/L (r=0.9999) for menthone and 0.002-5.0g/L (r=0.9996) for pulegone, the recoveries of menthone and pulygone were 96.30%-103.9% and 95.7%-102.5%, respectively. Conclusion: The method was simple and accurate, which could be applied to the determination of menthone and pulegone in Herba Schizonepetae.

Study on the process of including volatile oil of Herba Schizonepetae and Pericarpium Citri Reticulatae with ?-cyclodextrin / 中成药

Objective: To study optimum inclusion process conditions for volatile oils from Herba Schizonepetae and Pericarpium Citri Reticulatae Methods : The grinding method was compared with the saturated water solution method by determining the ultilization ratio of volatile oil from both herbs. The optimum preparation conditions were investigated by the orthogonal design. The quality of inclusion compound of volatile oil before and after being included were analyzed by TLC. Results : The optimum preparation conditions for inclusion were established as follow ultilization ?-CD and oil was 8∶ 1, The proportion of water and ?-cyclodextrin was 4∶1 (g:mL), and inclusing time up to three hours, The ultilization ratio of oil was 87.1% . Conclusion : The grinding method is better than the saturated water solution method. The method is applicable.

Determination of 4′-O-?-D-glycosyl-5-O-methylvisamminol in Jingfuzhiyang Granules by RP HPLC / 中成药

AIM: To establish a RP HPLC method for the determination of 4′ O ? D glycosyl 5 O methylvisamminol in Jingfuzhiyang Granules (Herba Schizonepetae, Fructus kochiae, Radix Saposhnikoviae, Fructus Crataegi, etc.). METHODS: The sample was separated on Turnner Kromasil C 18 column (4.6mm?200mm,5?m) with mobile phase of methanol 0.05mol?L -1 potassium dihydrogen phosphate acetic acid isopropyl alcohol (85∶170∶4∶4,v/v). The detection wavelength was set at 254nm and the flow rate was 1.0mL?min -1 . The column temperature was 30℃. RESULTS: The calibration curve was linear in the range of 0.0606～0.606?g (r=0.9994). The average recovery was 92.2%. CONCLUSION: This method proves to be relatively simple and accurate, and available for the quality control of Jingfuzhiyang Granules