实时直接分析-串联质谱法(DART-MS/MS)快速检测吐根中生物碱

目的:在未经前处理和色谱分离的情况下应用实时直接分析-串联质谱法检测吐根生物碱。方法:在优化的条件下全扫描采集药材,茎及叶的DART-MS(direct analysis in real time,DART)特征图谱,并对生物碱进行二级质谱确证,采用多反应监测模式通过测定样品表面待测物的质谱峰强度来计算其在样品中的平均含量。结果:药材和茎的图谱中均有明显的吐根碱和吐根酚碱的质子化离子峰m/z 481,467,叶中m/z 479,465为其他生物碱的质子化离子峰,定量方法的重复性和线性良好。结论:该模式或在药材、饮片的快速鉴别及实时对中间体或成品的快速定量分析中发挥作用。

Rapid detection of alkaloids in ipecac by direct analysis in real time tandem mass spectrometry (DART-MS/MS)

Objective: To detect alkaloids in Ipecac by direct analysis in real time tandem mass spectrometry(DART-MS)without pre-treatment and chromatographic separation. Method: Under the optimum conditions, DART-MS characteristic spectra were collected for tablet of Ipecac powder, Ipecac stems and leaves by full scanning, and secondary spectra were adopted for identifying alkaloids. The multiple reaction monitoring mode was adopted to determine the mass spectrum peak intensity of determinands on the surface of determined samples, in order to calculate their average content in samples. Result: Spectra of tablet of Ipecac powder and Ipecac stems showed remarkable ionized ion peaks of emetine and cephaeline at m/z 481 and 467, while spectra of leaves showed ionized ion peaks of other alkaloids at m/z 479 and 465. Furthermore, the quantitative analysis was also demonstrated with good reproducibility and linear relationship. Conclusion: The mode can play a role in rapid determination of medicinal materials and prepared herbal medicines and real-time rapid quantitative analysis on intermediates and preparations.