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IAEA環境試料極微量プルトニウムの正確な高感度分析技術

Accurate sensitive analytical technique of ultra-trace plutonium in the IAEA environmental samples

宮本 ユタカ; 安田 健一郎; 鈴木 大輔; 江坂 文孝; 間柄 正明

Miyamoto, Yutaka; Yasuda, Kenichiro; Suzuki, Daisuke; Esaka, Fumitaka; Magara, Masaaki

IAEA環境試料に含まれるフェムトグラムからピコグラムの極微量プルトニウムの量および同位体比をICP-MSで正確に測定するために取り組んでいる最新の分析技術や、GUMに準拠した考え方を取り入れた測定値の不確かさ評価について述べるとともに、サブフェムトグラムのAm定量の可能性についても触れた。

Our updated analytical techniques of ultra-trace plutonium in the IAEA environmental samples by ICP-MS were mentioned. Some careful techniques to accurately determine ultra-trace plutonium in the range of femto-grams to pico-grams were introduced. The uncertainties of analytical results were estimated according to the GUM concept. Our trials of determination of sub-femto grams americium in an environmental sample were also mentioned.

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