Conclusions
The HPLC and LC-MS/MS methods were successfully tuned for the
qualitative analysis of green tea extract with EGCG and ECG. Four major catechins were
separated and identified by LC-MS/MS, such as EGCG, epigallocatechin, ECG and
epicatechin. The result of HPLC analysis showed that EGCG and ECG were main
components from catechins isolation of green tea GMB-4 clone.