ABSTRACT
Objective:To establish a quality standard for vinegar frankincense in Liuwei Jingkang capsules. Methods: TLC was used for the identification of vinegar frankincense. HPLC was used for the content determination of acetyl-11-keto-β-boswellic acid (AKBA), which was the main active component in vinegar frankincense. A SHIMADZU Shim-pack VP-ODS(250 mm × 4. 6 mm,5μm) column was used. The mobile phase consisted of acetonitrile and water containing 0. 01 mol·L-1 hydrochloric acid (78 ∶22) at a flow rate of 1. 5 ml·min-1 . The column temperature was 30℃. The detection wavelength was 252 nm, and the injection volume was 10 μl. Results:The TLC method could identify the characteristic fluorescence of vinegar frankincense was without interference from the blank. There was a good linear relationship of AKBA within the concentration range of 0. 036 5-0. 730 8 mg·ml-1(r=0. 999 7). The average recovery was 98. 24% (RSD=0. 83%, n=9). Conclusion:The established method is accurate, highly sensitive and well re-producible, which can be used for the quality control of Liuwei Jingkang capsules.
ABSTRACT
OBJECTIVE:To establish the RP-HPLC method for simultaneous determination of flavonoids(quercetin,cyanidenon,spinacetin,and 6-methoxyl-cyanidenon) in Inula britannica. METHODS:The samples were separated on chromatographic column Inertsil ODS-3(250 mm?4.6 mm,5 ?m) at a column temperature of 40 ℃.The mobile phase consisted of methanol-acetonitrile-0.49% citric acid(gradient elution) at a flow rate of 1.0 min?mL-1. The detection wavelength was set at 360 nm. RESULTS:The linear ranges of quercetin,cyanidenon,spinacetin,and 6-methoxyl-cyanidenon were 0.17～6.8 ?g(r=0.999 9),0.088～3.52 ?g(r=0.999 9),0.020 2～0.808 ?g(r=0.999 9) and 0.045～1.8 ?g(r=0.999 6),respectively,and the average recoveries of all stood at 96.03%～99.78% and RSD at 0.73%～1.36%(n=6 each). CONCLUSION:The method is simple,sensitive,accurate and reproducible,and it is applicable for the quality control of the raw medicinal substance and preparation of I.britannica.
ABSTRACT
OBJECTIVE:To study the flavonoids in Inula britannica.METHODS:The Inula britannica was extracted with 95% ethanol and isolated and purified by different column chromatography,the structures of the constituents were derived by measuring the physicochemical constants and spectral analysis.RESULTS:A total of 10 flavonoids were isolated from Inula britannica which were stated as follows:Spinacetin(1),6-methoxy-luteolin(2),Iuteolin(3),Quercetin(4),Isorhamnetin(5),Kaempferol(6),Rutin(7),Patulitrin(8),Isoquercitrin(9)and Quercitrin(10).Of which,compounds 5,7 and 10 were isolated from Inula britannica for the first time.CONCLUSION: This result serves as a scientific basis for the further study of Inula britannica.