Simultaneous official methods using GC-MS/MS and LC-MS/MS for quantifying residual pesticides in agricultural products are
widely used at quarantine stations, inspection laboratories, and prefectural institutes in Japan. The worldwide helium shortage led to
limited helium availability and higher costs in 2019. To ensure the safety of foods, it is important to maintain a continuous monitoring
system. We selected 31 pesticides that can be analyzed using GC-MS/MS official methods and attempted to quantify them using
an official LC-MS/MS method. We could not set selected reaction monitoring conditions for 15 of the 31 pesticides due to low ion
intensity but conducted recovery tests for the remaining 16 pesticides in brown rice, soybean, peanuts, spinach, cabbage, potato,
eggplant, orange, apple, and tea. The 16 pesticides were spiked into homogenized samples at the Japanese maximum residue levels
established for each sample type. The coefficient of determination (
R2
) values for all the standard calibration curves showed good
linearity (
R2>0.9993). The results showed good recoveries for most of the ten tested agricultural products. This study suggests that
the 16 selected pesticides suitable for GC-MS/MS analysis can also be quantified using the official LC-MS/MS method.
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