Comparative study of direct injection analysis and liquid chromatography mass spectrometry for identification of chemical constituents in Kudiezi injection by FT-ICR MS

In order to evaluate the performance of direct injection analysis (DIA) and liquid chromatography-mass spectrometry (LC–MS) with ESI-FT-ICR MS on identification of chemical constituents in traditional Chinese medicines (TCMs), Kudiezi injection was selected and analyzed as a sample by both methods. The discovery and identification capacities of two methods were compared, and MS/MS experiments were also carried out to identify chemical...