Authentic compound-free strategy for simultaneous determination of primary coumarins in Peucedani Radix using offline high performance liquid chromatography-nuclear magnetic resonance spectroscopy-tandem mass spectrometry
Keywords: Authentic compound-independent quantitation; Offline LC-NMR-MS/MS; Automated fraction collection module; Quantitative 1H NMR; Peucedani Radix; Regio-specific monitoring;