ポスター発表
- 第1日 5月15日（月） P会場（ホワイエ，会議室1004-1007）
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1P-11（1B-O-1112） PDF
HPLC-ICP-MS/MSを用いた表層水中の有機リン系農薬とその代謝物の高感度定量法の確立
Organophosphorus pesticides such as glyphosate and glufosinate are used worldwide, and environmental regulatory values are being adopted in many countries due to their potential toxicity. In the present work, a pretreatment-free analytical method is established in which these two compounds with their metabolites were isolated each other by anion-exchange HPLC using pH- and concentration-optimized ammonium acetate as eluent and detected by triple quadrupole ICP-MS. The very low detection limits of 0.06-0.12 ppb are acquired through the detection of P+ as PO+ via oxygen reaction mode, and quantitative recovery was obtained from the spike-recovery test on river water samples containing phosphoric acid as an isobaric interferent. In addition, a constant sensitivity per molar concentration was achieved regardless of the compounds due to the powerful ion source of ICP-MS. This property suggests that semi-quantitative analysis of unknown P-bearing compounds is possible from one calibration curve.