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Tea Identification through Surface Assisted Laser Desorption/Ionization Mass Spectrometry

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Figure

Figure 1. Chemical structures and m/z identified in this study.values of CAP (internal standard), theanine, and four catechins in the tea samples
Figure 3. NPs. Concentrations of CAP: (a) 5 uM, (b) 10 uM, and (c) 100 uM. Insets to (a)–(c): mass spectra in the 480 Da
Figure 4. Mass spectra of four tea solutions in the presence of CAP (10 μin Figure 2.Tea solutions: (a) PJK 550, (b) PJK 2503, (c) PJK 1069, and (d) PJK 2589
Figure 5. Mass spectra of four tea solutions in the presence of CAP (10 uM) recorded through SALDI-MS using TiO2 NPs
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