Quantitative Identification of Antioxidant Basis for Dendrobium Nobile Flower by High Performance Liquid Chromatography-Tandem Mass Spectrometry

Figure 9

Comparison of the detected results by HPLC-MS/MS and common determination method in D. nobile. (a) Amino acid and its derivatives (n = 123), (b) organic acid and its derivatives (n = 105), (c) flavonoids (n = 111), (d) total proteins, (e) total organic acids, (f) total flavonoids. (a), (b), and (c) were based on the results of HPLC-MS/MS. (d), (e), and (f) were detected by corresponded colorimetry or titrimetry.

(a)

(b)

(c)

(d)

(e)

(f)