蛇床子配方颗粒HPLC指纹图谱研究及6种香豆素类成分含量测定

HPLC fingerprint of Cnidii Fructus formula granule and determination of six main coumarin components

目的建立蛇床子配方颗粒HPLC指纹图谱及花椒毒酚、花椒毒素、异茴芹素、佛手柑内酯、欧前胡素和蛇床子素6种香豆素类成分含量测定方法,为蛇床子配方颗粒物质基准的研究提供参考。方法采用HPLC法,色谱柱为Waters XBridge C18(250 mm×4.6 mm,5μm),甲醇-0.1%醋酸水溶液为流动相,梯度洗脱;体积流量为0.5 mL/min,进样量为10μL,柱温40℃。蛇床子配方颗粒HPLC指纹图谱及花椒毒酚、花椒毒素、异茴芹素、佛手柑内酯、欧前胡素、蛇床子素含量测定的检测波长为320 nm。采用国家药典委员会出版的"中药色谱指纹图谱相似度评价系统"(2012版),建立蛇床子配方颗粒指纹图谱,并使用HPLC法同时测定6种香豆素成分含量。结果对18批蛇床子配方颗粒进行了研究,其指纹图谱相似度均≥0.992,标定了19个共有峰,各峰分离度较好。含量测定结果表明花椒毒素与蛇床子素为蛇床子配方颗粒中含量较高的香豆素类成分。经方法学考察,方法精密度RSD值均小于1.6%,方法的重复性良好,样品在48 h内稳定;花椒毒酚、花椒毒素、欧前胡素、异茴芹素、佛手柑内酯和蛇床子素的加样回收率分别为100.69%、101.03%、99.48%、100.88%、101.27%、100.35%,RSD均小于2.5%;6种成分在一定质量浓度内线性关系良好;18批蛇床子配方颗粒中花椒毒酚、花椒毒素、异茴芹素、佛手柑内酯、欧前胡素、蛇床子素的质量分数依次为8.01~8.29、2.37~2.63、4.30~4.61、4.04~4.40、3.45~3.90、6.02~6.80 mg/g。结论建立了蛇床子配方颗粒的指纹图谱及同时测定其6种主要香豆素类成分含量的方法,操作简便,结果稳定、准确,对建立蛇床子配方颗粒的质量控制标准提供了依据,具有重要的应用价值。

Objective To establish an HPLC fingerprint of Cnidii Fructus formula granule analysis method for simultaneous determination of six main coumarin components, including osthol, xanthotoxin, xanthotol, bergapten, imperatorin and isopimpinellin, in order to provide reference for the study of the material basis of Cnidii Fructus formula granule. Methods The method was performed by high performance liquid chromatography with a Waters XBridge C18(250 mm × 4.6 mm, 5 μm) column and methanol(A)-0.1% acetic acid(B) as the mobile phase for gradient elution. The flow rate was 0.5 mL/min, the injection volume was 10 μL and the column temperature was 40 ℃. The detection wavelength was set at 320 nm. The chromatographic fingerprint evaluation system published by the State Pharmacopoeia Commission(2012 Edition) was used to establish the fingerprint of Cnidii Fructus formula granule, and the content of six main coumarin components was simultaneously determined. Results The research on the 18 batches of Cnidii Fructus formula granule showed that the fingerprint similarity was greater than 0.992 and 19 common peaks were calibrated with satisfied peak resolution. The content determination results showed that the content of both xanthotoxin and osthol were the main coumarin components in Cnidii Fructus formula granule. According to the methodological investigation, the precision RSD values were all less than 1.6%. The sample was stable within 48 h and this method had good repeatability. The average recovery rates of xanthotol, xanthotoxin, imperatorin, isopimpinellin, bergapten and osthol were 100.69%, 101.03%, 99.48%, 100.88%, 101.27% and 100.35%, respectively. All of these coumarin components’ RSD were less than 2.5%. The six components showed a good linear relationship within a certain concentration range. The results of the content determination of xanthotol, xanthotoxin, isopimpinellin, bergapten, imperatorin and osthol respectively were 8.01-8.29, 2.37-2.63, 4.30-4.61, 4.04-4.40, 3.45-3.90 and 6.02-6.80 mg/g among the 18 batches of the Cnidii Fructus formula granule. Conclusion The fingerprint method and the determination method of six main coumarin components in the Cnidii Fructus formula granule established in this study are simple, stable, accurate and reliable. This method can be used for the quality control of the Cnidii Fructus formula granule.