一测多评法测定淫羊藿中淫羊藿苷和朝藿定A、B、C

目的建立一测多评(QAMS)法测定淫羊藿中的黄酮类成分,以提高淫羊藿药材的质量控制水平。方法采用HPLC法,检测波长为270 nm,在一定的线性范围内,测定淫羊藿苷与朝藿定A、朝藿定B、朝藿定C的相对校正因子,并考察不同色谱柱、不同仪器测定各成分相对校正因子的重现性,以淫羊藿苷为对照品,用所建立的相对校正因子计算淫羊藿药材中朝藿定A、朝藿定B、朝藿定C的量;同时采用外标法测定100批淫羊藿药材中4种成分的量,以验证QAMS法的准确性和科学性。结果所建立各成分的相对校正因子重现性良好,分别为1.352、1.384、1.340,其RSD值均小于5%,采用该校正因子计算的朝藿定A、朝藿定B、朝藿定C的量与外标法实测值之间没有显著性差异。结论该方法准确可靠,简便可行,且节约对照品及检测成本,该方法可以作为淫羊藿药材多指标成分测定质量控制方法。

Determination of icariin, epimendin A, epimendin B, and epimendin C in Epimedii Herba by QAMS

Objective To establish a method of quantitative analysis of multi-components by single marker(QAMS) for determining the flavonoids in Epimedii Herba and improve the level of quality control of Epimedii Herba by applying multi-index components control. Methods To detect a relative correction factor(RCF) of epimendin A, epimendin B, epimendin C, and icariin at detection wavelength of 270 nm by HPLC in the range of a linear, to investigate the reproducibility of RCF in different chromatographic columns and different instruments as well, to consider icariin as an internal standard, to calculate the contents of epimendin A, epimendin B, and epimendin C in Epimedii Herba by using RCF; Meanwhile, to analyze the content of the four components in 100Epimedii Herba by external standard method(ESM) and verify the accuracy and scientificalness of QAMS. Results The RCF had a good reproducibility, which were 1.352, 1.384, and 1.340. The values of RSD were less than 5%; No significant differences were found in the quantitative results of epimendin A, epimendin B, and epimendin C determined by using RCF and ESM. Conclusion This method could be accurate and reliable, simple and feasible, which could save the reference and costs of testing. It further validates that this approach can be used as a quality control method for the determination of multi-component index in Epimedii Herba.