An UPLC-Q-TOF/MS-Based Analysis of the Differential Composition of Dendrobium officinale in Different Regions

Figure 2

Profile analysis of secondary metabolomics of D. officinale in different regions. The quality control and typical base peak chromatogram of D. officinale in positive ion mode (a, c) and negative ion mode (b, d). PCA score plot of D. officinale from four regions (e).

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