Characterisation of Flavonoid Aglycones by Negative Ion Chip-Based Nanospray Tandem Mass Spectrometry

Figure 3

The negative ion nanospray product ion spectra of the eight flavonoids studied. Spectrum (a) is of quercetin, 1: (precursor ion (PI) m/z 301), (b) myricetin, 2: (PI m/z 317), (c) apigenin, 3: (PI m/z 269), (d) luteolin, 4: (PI m/z 285), (e) naringenin, 5: (PI m/z 271), (f) hesperetin, 6: (PI m/z 301), (g) catechin, 7: (PI m/z 289), and (h) epigallocatechin 8: (PI m/z 305).

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