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Quantitative estimation of pesticide residues in tea samples wasestablished byemploying Liquid Chromatography with tandem mass spectrometer using electron spray ionization (LC-ESI-MS/MS) in multiple reaction modes (MRM).The modified QuEChERS(quick, easy, cheap, effective, rugged, and safe)sample extraction procedure was used in the analysis.In dispersive solidphase extraction(d-SPE),PSA+GCB (800 mg + 25mg) sorbents and 750 MgSO4 were used, whichenhancesin clean up capabilities and obtained good recoveries.The developed method was validated by employing LC-MS/MS at the different spiking concentration levels from 5-100 ng.mL -1 .The experimental results showed and found that the matrix-matched calibration curve linearity was r 2 > 0.99130 for total targetanalytesin all samples. Better recoveries were obtained between 70% to 120% with the acceptablerelative standard deviation (RSD).The limits ofdetection rangedfrom 0.03 ng.mL -1 to1.4ng/mL -1 and limit of quantifications from0.1 to2.6 ng.mL -1 for all the samples under investigation.The established method was successfully applied for the estimation of pesticideresidues in real tea samples.The experimental results are found to be the presence of anthraquinonepesticide residue in the concentration ranging from 7.2-8.5ng.mL -1 in threeout of tentea samples under investigation.

MODIFIED QUECHERS METHOD FOR DETERMINATION OF MULTI-PESTICIDE RESIDUES IN INDIAN TEA SAMPLES BY LC-MS/MS