An analytical method for arsenic in agricultural products using hydride generation-atomic absorption spectrometry

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  • 水素化物発生原子吸光法による農産物中のヒ素分析法
  • スイソカブツ ハッセイ ゲンシ キュウコウホウ ニ ヨル ノウサンブツ チュウ ノ ヒソ ブンセキホウ

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The maximum residue limits (MRL) for arsenic in the eleven agricultural products as pesticide residues is set in Japan. A method for the determination of arsenic pesticide residues in the agricultural products using hydride generation-atomic absorption spectrometry method was developed. The samples were digested by wet ashing method using nitric and sulfuric acid, pre-reduced by hydrochloric acid and potassium iodide to prepare test solution, prior to measurement by hydride generation-atomic absorption spectrophotometer. The absorbance of test solution after pre-reduction was stable until 30 minutes. The calibration curve in the concentration of 1.0-10 ng/mL had good linearity. The proposed method was validated for 11 kinds of agricultural products at MRL. The results showed excellent recoveries (98.7-105.4%) and repeatability (2.1-4.7%). The study showed that the developed method using hydride generation-atomic absorption spectrometry method is reliable and applicable for the determination of arsenic in the agricultural products as the regulation of pesticide residue.

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