Analysis of multiple pesticide residues in salad using triple quadrupole GCMS/MS system
After optimizing MRM transitions for each pesticide, a mixture of 100 pesticides was analysed in a single run. Experiment was planned accordingly to carry out extraction of pesticides in the salad, in pre-cooked and post-cooked conditions. The recovery studies were carried out by spiking 100ppb mixture of pesticides and recovery was found to be within acceptable range. It was observed that the pesticide residues were considerably less in post-cooked salad as compared to pre-cooked.
Linearity of each pesticide for concentration levels ranging from 10ppb to 500ppb was having regression coefficient >0.99. The %RSD for six replicate injections of 100ppb concentration was found to be less than 5%.
The LOD values for individual pesticides were in the range of 0.1ppb to 3ppb. Similarly, the LOQ values were within the range of 0.5ppb to 10ppb.
Mass Spectrometry, Gas Chromatograph-Mass Spectrometry
Pesticide, Agriculture, QuEChERS method, Food, Beverages, Food safety (Residues, Contaminants), GCMS-TQ8030