Quantitative Analysis of Trace Level Pesticides in Vegetable Foods by GC/MS/MS

For accurate quantification, representative matrix-matched calibration curves were applied to compensate matrix effects. The relative coefficients (r) of the most 306 kinds of mixed matrix-matched pesticides standard solutions from 1 to 100μg/L are above 0.999. The mixed standard solution was added into the blank vegetable sample and pretreated same as the blank vegetable sample to make the concentration of 1.0 and 5.0 μg/kg. For most of analytes recoveries in the acceptable range of 70~110% and the RSD% of 6 parallel tests were below 10% for both matrices at spiking levels of 1.0 and 5.0 μg/kg. The LODs of the 306 kinds of pesticides were 0.02~2.00 μg/L.