Validation Study on a Multi-Residue Method for Determination of Pesticide Residues in Agricultural Products by New Automatic Pretreatment Equipment (FASRAC) and GC-MS/MS

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  • 新規自動前処理装置（FASRAC）を用いたGC-MS/MSによる農産物中の残留農薬一斉試験法の妥当性評価
  • 妥当性評価 新規自動前処理装置(FASRAC)を用いたGC-MS/MSによる農産物中の残留農薬一斉試験法の妥当性評価
  • ダトウセイ ヒョウカ シンキ ジドウ マエショリ ソウチ(FASRAC)オ モチイタ GC-MS/MS ニ ヨル ノウサンブツ チュウ ノ ザンリュウ ノウヤク イッセイ シケンホウ ノ ダトウセイ ヒョウカ

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Abstract

A validation study was performed on a multiresidue method for determination of pesticide residues in agricultural products according to the method validation guideline of the Ministry of Health, Labour and Welfare of Japan. FASRAC (Food Automatic Analytical Systems for Residual Agricultural Chemicals) automatically performs extraction of pesticide residues from agricultural products with acetonitrile, filtration, constant volume, mixing with the use of air, mixing acetonitrile with buffer solvent, separation, and dehydration with sodium sulfate. The extract was purified with a GC/NH2 column. For wheat flour and soybeans, a purification step with a C18 column was added before a GC/NH2 column. After removal of the solvent, the extract was resolved in n-hexane/acetone solvent for GC-MS/MS analysis. In the case of manual analysis, pesticide residues were analyzed according to official multiresidue methods and purification steps were the same as in FASRAC. Recovery tests were performed with wheat flour, soybeans, spinach and apples, by addition of 302 pesticides at the concentrations 0.01 mg/kg. The results indicate that automatic extraction using FASRAC is superior to manual analysis in trueness, repeatability and within-run reproducibility. Specially, automatic extraction using FASRAC is superior to manual analysis in trueness because it is optimized in various respects, for example reextraction at salting-out.

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