半边旗二萜类化合物的液-质联用图谱鉴定

用高效液相色谱-大气压化学电离源质谱联用的方法建立总离子流色谱图,以色谱保留时间和色谱峰的质谱图为依据,对不同地区和不同采集时间的半边旗LC-MS图谱中的主要色谱峰进行了对比分析和质谱鉴定.色谱分析条件:色谱柱为Diamonsil ODS、4.6 mm×150mm,流动相为30%CH3CN-70%2mmol/L NH4AC、流速1.0 ml/min,进样5 μl;质谱分析条件:APCI负离子源,质谱扫描范围m/z 50～700,扫描间隔1s.以对照品为参比,鉴定出贝壳杉烷系二萜类化合物4F、5F和6F的色谱峰;根据色谱行为和质谱行为,推测出6F的16位饱和态化合物以及4F和5F的甙.对不同地区和采集时间的半边旗LC-MS指纹图谱中的主要色谱峰进行比较分析得出,广州市郊和湛江地区以及在11～12月采集的半边旗中5F含量较高.本法简便、快速,可为半边旗中二萜类抗癌化合物的深入研究和新药资源的开发提供参考.

Investigation on the Chromatogram of Diterpenoids in Pteris semipinnata by HPLC-APCI-MS

To identify and compare the main peaks of HPLC-APCI-MS FP of the diterpenoids in Pteris semipinnata collected from different region and time, a quadrupole mass spectrometer coupled with atmospheric pressure chemical ionization interface was employed as a detector for HPLC to establish total ion chromatography.HPLC retention time and MS spectrum were used to identify comprehensively.4F,5F and 6F were identified from the chromatography comparing with their standards.The saturated state of 6F and glycoside of 4F and 5F were inferred.The content of 5F in samples collected from region of Guangzhou or in Nov.and Dec.were comparatively higher.This method is highly effective and fast,which can be applied to research and develop for diterpenoids in Pteris semipinnata L as new antitumor drug resource.