Abstract
A novel quantitative method using high-performance liquid chromatography coupled to electrospray ionization tandem mass spectrometry was developed for simultaneous determination of the important active constituents including four steroidal saponins, two xanthone glycosides, two isoflavonoids, and one anthraquinone in different parts of Anemarrhena asphodeloides from different habitats. Hierarchical clustering analysis and principal components analysis were performed to differentiate and classify the samples. The separation was performed on a C(18) column with acidified aqueous acetonitrile gradients. Quantification of the analytes was achieved by use of a hybrid quadrupole linear ion-trap mass spectrometer. Multiple-reaction monitoring scanning was employed with switching electrospray ion source polarity between positive and negative modes in a single run. The validation results of the method indicated that the method was simple, rapid, specific, and reliable. The results demonstrated that the quantitative difference in content of nine active compounds was useful not only for chemotaxonomy of many samples from different sources but also for the standardization and differentiation of many similar samples. Simultaneous quantification of bioactive components by HPLC-ESI-MS coupled with chemometric techniques would be a well-acceptable strategy to comprehensively control the quality of A. asphodeloides.
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