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酸素,アンモニア混合ガス反応を用いたICP-MS/MSによる$$^{90}$$Sr分析法の開発

Development of an analytical method for $$^{90}$$Sr with ICP-MS/MS using O$$_{2}$$ and NH$$_{3}$$ mixed gas reaction

小荒井 一真   ; 松枝 誠   ; 寺島 元基  

Koarai, Kazuma; Matsueda, Makoto; Terashima, Motoki

近年、ICP-MS法は$$^{90}$$Srの新たな分析手法として開発されているが、低濃度の$$^{90}$$Sr試料の分析に課題がある。本研究では、ICP-DRC-MS/MSと酸素,アンモニア混合ガス反応を組み合わせた$$^{90}$$Srの分析方法を開発し、開発した手法を土壌標準物質の$$^{90}$$Sr分析に適用できることを確認した。

Analytical methods with inductively coupled plasm mass spectrometry (ICP-MS) have been developed for the determination of $$^{90}$$Sr in environmental samples; however, the sensitivity of the ICP-MS methods and removal of interferences are insufficient to measure trace amount of $$^{90}$$Sr in the environmental samples. In this study, we developed an analytical method for $$^{90}$$Sr with ICP-DRC-MS/MS using oxygen and ammonia mixed gas reaction. This analytical method could be applied for measurement of $$^{90}$$Sr in reference soil.

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