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自Bowen提出用开孔聚氨酯泡塑富集痕量物质以来,有无负载的泡塑在富集分离中的应用受到广泛注意。但对锕系元素的泡塑富集研究不多。本文系统研究了PMBP负载泡塑从醋酸介质中萃取痕量铀(Ⅵ)。在最佳萃取条件下,一次萃取即可从大体积水中几乎定量地回收痕量铀,绝对富集因子达4500以上。用PMBP泡塑萃取富集,用偶氮胂Ⅲ光度测定,可分析大体积水样中低至xμg/l水平的铀。方法简便、快速。
Since Bowen proposed the use of open-cell polyurethane foam enrichment of trace substances, the presence or absence of load-bearing foam in the enrichment and separation applications are widely noticed. However, there are not many studies on the foam plastic enrichment of actinides. This paper systematically studied the extraction of trace uranium (Ⅵ) from acetate media by PMBP load foam molding. In the best extraction conditions, an extraction can be almost quantitative recovery of trace amounts of uranium from a large volume of water, the absolute enrichment factor of more than 4500. With PMBP foam plastic enrichment, with arsenazo Ⅲ photometric determination of large water samples can be as low as xμg / l level of uranium. The method is simple and fast.