Characterisation of Flavonoid Aglycones by Negative Ion Chip-Based Nanospray Tandem Mass Spectrometry
Negative ion nanospray spectra of the green tea extract. Spectrum (a) is the total extract recorded over a wide m/z range. Spectrum (b) is an enlargement of (a) to show the peak at m/z 301 at approximately 2% of the intensity of the most intense ion in spectrum (a). Spectrum (c) is the product ion spectrum of m/z 301 which clearly demonstrates the sensitivity of the technique.
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