QUECHERS SAMPLE PREPARATION AND GAS CHROMATOGRAPHY-TANDEM MASS SPECTROMETRY ANALYSIS OF MULTI-PESTICIDE RESIDUES IN TEA AND GRAIN

摘要

Tea and grain represent complex samples that are difficult to be extracted and cleaned-up in multi-pesticide residue analysis. In this study, a very simple and robust QuEChERS method combined with GC-MS/MS for the determination of 219 pesticides in tea and grain has been developed. Satisfactory LOQs, precision and accuracy were obtained, proving the suitability of the method for the multi-pesticide residue analysis in tea and grain for the routine residue monitoring purposes.