基于HPLC-Q-TOF-MS/MS定性分析当归中多种香豆素类成分

Qualitative Analysis of Multiple Cumarins in Angelicae Sinensis Radix Based on HPLC-Q-TOF-MS/MS

目的:建立高效、稳定的HPLC-Q-TOF-MS/MS方法,系统、全面地定性分析当归中多种香豆素成分,为当归质控标准的完善、香豆素的开发及临床应用提供依据。方法:通过调整液相色谱柱种类、温度、流动相、流速、样品浓度等条件,建立可高效分离当归提取液中香豆素成分的HPLC-Q-TOF-MS/MS,并结合对照品、精确相对分子质量、极性、裂解规律、参考文献等鉴定当归中多种香豆素类成分。结果:该研究建立了一种高效、稳定的香豆素分离方法,并鉴定出14种香豆素成分,发现其存在大量的同分异构体,其中珊瑚菜素、王草酚等香豆素成分较少作为当归成分被报道;同时通过分析香豆素类成分的主要碎片离子,发现香豆素类成分在质谱中主要通过母核侧链的甲氧基键或苯甲醚键的断裂以及侧链上其他基团的丢失而裂解,总结出香豆素成分的一般裂解规律。结论:当归中含有大量的香豆素类成分,将其深入定性、定量分析可进一步完善当归的质量标准,并为香豆素的开发及当归的临床应用提供参考。

Objective: To systematically and comprehensively analyze coumarin components in Angelicae Sihensis Radix by an efficient and stable HPLC-Q-TOF-MS/MS method,in order to offer the theoretical basis to develop coumarin,establish the quality control standard and apply in clinic. Method: The separation effect of coumarin components was extracted by adjusting the column, temperature, mobile phase, flow rate, sample concentration and other conditions,and various coumarin components in Angelicae Sihensis Radix were identified by corresponding standards,precise molecular mass,polarity,pyrolysis pattern. Result: In this study,a highefficiency and stable coumarin separation method was established that can be used to separate complex components,and 14 coumarin components were identified in this study,including phellopterin and osthenol that were rarely reported as effective components in Angelicae Sihensis Radix. Major fragment ions of coumarin components were analyzed. The cleavage in methoxy bond or anisole bond on the parent nucleus was the primary pattern for coumarin components,which was summarized for detecting unknowing coumarins. Conclusion: Abundant coumarins were contained in Angelicae Sihensis Radix. Further qualitative and quantitative analysis of coumarins are conducive to improving the quality standards of Angelicae Sihensis Radix, and providing reference for the development of coumarins and clinical application of Angelicae Sinensis Radix.