ヘリウムガス供給不足に対応した農産物中の残留農薬等の LC-MS/MS を用いる一斉試験法の適用検討

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  • Evaluation of simultaneous LC-MS/MS method for quantifying residual pesticides in agricultural products as a measure against the helium shortage
  • ヘリウムガス キョウキュウ ブソク ニ タイオウ シタ ノウサンブツ チュウ ノ ザンリュウ ノウヤク トウ ノ LC-MS/MS オ モチイル イッセイ シケンホウ ノ テキヨウ ケントウ

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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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