環境試料中のα線放出核種の選択的分離に関する研究
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概要
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A separation and preconcentration method of alpha emitting nuclides using an anion exchange resin, extraction chromatographic resin, chelating resin disk and anion exchange resin disk was studied for the determination of nuclides in environmental samples. The target alpha emitting nuclides were Po (^<210>Po),U (^<238>U, ^<235>U and ^<234>U), Th(^<232>Th, ^<230>Th and ^<228>Th), Pu(^<238>Pu, ^<239>Pu and ^<240>Pu) and Am (^<241>Am). The aim of this study was to develop a rapid and efficient analytical method of these nuclides in environmental samples for environmental monitoring. In preliminary experiments, the adsorption and elution behaviors of the target nuclides and interference elements were investigated on an anion exchange resin (Th), crown ether impregnated extraction chromatographic resin (Po), organophosphorus extractant impregnated extraction chromatographic resin (Pu, Am), chelating resin disk (U) and anion exchange resin disk (Pu). The decontamination factors of interference elements were measured. The preparation procedures (alpha ray counting sample), including electrodeposition (Th, Po), spontaneous deposition (Po), coprecipitation onto micro-quantity NdF_3 precipitate (Pu, Am) were studied. The developed methods were successfully applied to certified reference materials and environmental samples. As a result, the developed methods are useful for the monitoring of alpha emitting nuclides in environmental samples.
- 社団法人日本分析化学会の論文
- 2004-05-05
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