RP-HPLC测定牡丹皮饮片中3种活性成分的含量

目的：建立同时测定中药饮片牡丹皮中没食子酸、芍药苷和丹皮酚3种有效成分含量的反相高效液相色谱分析方法。方法：采用YMC-C₁₈柱,以甲醇-0.05%磷酸为流动相,梯度洗脱,针对不同类型组分,实行分段变波长检测,以外标法定量。结果：没食子酸、芍药苷和丹皮酚的线性范围分别为0.013 0～0.267,0.088 0～1.76,0.164～3.28 μg；平均加样回收率分别为104.3%,101.7%,99.5%。结论：本方法准确可靠,重复性好,回收率高,适用于丹皮及其制剂的质量分析。

Simultaneous determination of three active constituents in Cortex Moutan by RP-HPLC

OBJECTIVE: To establish a RP-HPLC method for the simultaneous determination of gallic acid, paeoniflorin and paeonol in Cortex Moutan. METHOD: The analysis was carried out on a column of YMC-C18 (4. 6 mm x 250 mm, 5 microm), and gradient elution was used for the baseline separation of these three constituents with the different detection wavelength. RESULT: The linear ranges for gallic acid, paeoniflorin and paeonol were 0.0130-0.267, 0.0880-1.76 and 0.164-3.28 microg, respectively. Their average recoveries were 104.3%, 101.7% and 99.5%, respectively. CONCLUSION: The method was successfully applied to the determination of gallic acid, paeoniflorin and paeonol in Cortex Moutan from the different drugstores. It was shown in this study that the proposed method could be used to evaluate the quality of the medicinal plants or herbal preparations containing gallic acid, paeoniflorin and paeonol.