Abstract
Some analytical applications of neotridecanohxdroxamic acid used as stationary phase in extraction chromatography columns are reported. Separations of Am-U-Th and Np-Pu are obtained in aqueous solutions and under different experimental conditions. The hydroxamic acid shows a peculiar selectivity for Np(IV) and Pu(IV) at pH=0, and the two elements can be separated according to their respective valencies. A selective method for the determination of237Np and239Pu in urine is also described. The final recoveries are 73.5% for plutonium and 82.3% for neptunium, the decontamination factors and the sensitivity limits are suitable for the radiotoxicological detection of both elements.
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