ABSTRACT
Objective: To establish an HPLC method for the simultaneous determination of five active components (paeoniflorin, liquiritin, ammonium glycyrrhizinate, edomin and osthole)in Pifukang lotion with multiple UV wavelengths.Methods: A Diamonsil C18 (200 mm×4.6 mm,5 μm) column was used with the mobile phase consisting of 0.1% hydrochloric acid and acetonitrile with gradient elution.The flow rate was 1.5 ml·min-1, and the column temperature was 30℃.Paeoniflorin was detected at 232 nm(0-6 min), liquiritin was detected at 277 nm(6-10 min),and ammonium glycyrrhizinate, edomin and osthole were detected at 254 nm(after 10 min).Results: The linear range of paeoniflorin,liquiritin,ammonium glycyrrhizinate, edomin and osthole was 28.200-282.000 μg·mL-1(r=0.999 7),12.150-121.500 μg·ml-1(r=0.998 8),13.420-134.200 μg·ml-1(r=0.999 5),0.047-0.466 μg·ml-1(r=0.999 9) and 2.38-23.8 μg·ml-1(r=0.999 9), respectively.The average recovery (RSD) was 98.49%(0.71%), 99.00%(0.62%), 98.38%(0.85%), 97.36%(0.92%) and 97.70%(0.78%), respectively (n=6).Conclusion: The established method is simple, accurate, highly sensitive and well reproducible, which can be used for the determination of the five active ingredients in Pifukang lotion.
ABSTRACT
Objective:To optimize the flash extraction method for polygonatum saponin by orthogonal design. Methods: The ex-traction technology was optimized by L9 (34 ) orthogonal test based on the results of single factor experiments. The optimized conditions were as follows:the material liquid ratio was 1 ∶20, the extraction voltage was 100 V, the extraction time was 40s, and the herbs were extracted 3 times (40 s per time). Results:The ratio of material to liquid had significant effect on the extraction rate,and under the a-bove extraction conditions, the extraction amount of polygonatum saponin reached up to (38. 92 ± 0. 67) mg·g-1 . The order of extrac-tion rate was flash extraction >ultrasonic extraction> ethanol extraction. Conclusion:The flash extraction is beneficial to the extrac-tion of polygonatum saponin.
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.