Chemical Differentiation and Quantitative Analysis of Different Types of Panax Genus Stem-Leaf Based on a UPLC-Q-Exactive Orbitrap/MS Combined with Multivariate Statistical Analysis Approach

Figure 2

MS² spectra of (a) [M + HCOO]⁻ and (b) [M + Na]⁺ for Rd. (c) The signal intensity of product ions for Rd with respect to the NCE (glc represents glucose).

(a)

(b)

(c)