1973 Volume 46 Issue 1 Pages 162-165
The distribution study of neptunium ions in an aqueous solution containing Np(IV) and Np(V) was made using the metal chelate extraction system, TTA-benzene, or HDEHP-benzene at room temperature. The results obtained by this method were then compared with those obtained by spectrophotometry. In each system, a linear relationship was obtained between the fraction of the Np(V) ion and 1/(D+1), where D is the distribution ratio of neptunium. This analysis was performed with an accuracy of ±5% and was established within one minute in the case of the HDEHP-benzene system. The results obtained by this method were in good agreement with those obtained by spectrophotometry.
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