Simultaneous quantification of flavonoids and phenolic acids in Herba Scutellariae barbatae and its confused plants by high performance liquid chromatography-tandem mass spectrometry

► An HPLC-MS method was developed to analyse Herba Scutellariae barbatae. ► Hierarchical clustering analysis could distinguish 21 tested samples. ► Scutellarin was the highest component in Herba Scutellariae barbatae.