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Using CO$$_{2}$$ Reactions to Achieve Mass-spectrometric Discrimination in Simultaneous Plutonium-isotope Speciation with Inductively Coupled Plasma-Tandem Mass Spectrometry

ICP-MS/MSにおけるPu同位体の同時質量スペシエーションに向けたCO$$_{2}$$リアクション法の開発

松枝 誠   ; 川上 智彦*; 小荒井 一真   ; 寺島 元基  ; 藤原 健壮 ; 飯島 和毅  ; 古川 真*; 高貝 慶隆*

Matsueda, Makoto; Kawakami, Tomohiko*; Koarai, Kazuma; Terashima, Motoki; Fujiwara, Kenso; Iijima, Kazuki; Furukawa, Makoto*; Takagai, Yoshitaka*

誘導結合プラズマ質量分析法(ICP-MS)を用いて、複雑な同位体干渉を受けることなく、様々なPu同位体を同時に同定するための新しい方法論を開発した。ICP-MS/MS及びDRC内でのCO$$_{2}$$ガス反応を用いて、Pu同位体分析($$^{239}$$Pu, $$^{240}$$Pu, $$^{241}$$Pu, $$^{242}$$Pu, $$^{244}$$Pu)におけるAm, Cm, Uなどの同重体干渉によるバックグラウンドノイズ強度を除去した。

New methodology for a simultaneous isotope speciation of various Pu isotopes without complicated isobaric interferences is developed by using inductively coupled plasma-mass spectrometry (ICP-MS). In analyzing ICP tandem MS (ICP-MS/MS), CO$$_{2}$$ gas reactions in a dynamic reaction cell (DRC) almost eliminated the background noise intensity produced by isobaric interference from isotopes originating from actinides such as Am, Cm, and U at the locations (m/z) of significant Pu isotopes ($$^{239}$$Pu, $$^{240}$$Pu, $$^{241}$$Pu, $$^{242}$$Pu, $$^{244}$$Pu).

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