The aim of the present work was to compare and choose the best method to extract incurred
pesticide residues from green tea. Accelerated solvent extraction (ASE) with in-cell cleanup
and the quick, easy, cheap, effective rugged and safe (QuEChERS) methods were tested on
green tea samples with incurred beta-endosulfan pesticide. The extracts were analyzed by
GC-MS/MS and the recovery and the precision of both methods were compared. The average
recovery using ASE with the in-cell cleanup method was in the range of 89 to 92% which is
better than that obtained using a QuEChERS method. Both the ASE with in-cell cleanup and
the QuEChERS methods provided good precision with RSDs in the range of 12 to 15% and
17 to 18%, respectively. This finding indicates that the ASE method with the in-cell cleanup is
more suitable for the accurate determination of pesticides incurred in tea.