Fig. 9. LC-MS analysis of tea, fresh and heated EGCG. A: LC-MS mass fragmentation traces of green tea and PG Tips black tea extracts as indicated. EGCG peak boxed. B: LC-MS traces of fresh EGCG; lower, main peaks versus time; upper, mass fragmentation showing mass/charge (m/z). Main EGCG peak boxed. C: LC-MS traces of heated EGCG; lower, main peaks versus time; upper, mass fragmentation showing mass/charge (m/z).