Abstract
Protactinium was separated from major impurities by sorption on an anion-exchange resin from strong hydrochloric acid, followed by washing with the acid and elution with a mixture of hydrochloric and hydrofluoric acids. The gamma activity of the isotope (Pa 231) provided an adequate analytical procedure. Addition of either aluminium chloride or boric acid to the elution effluent rendered the protactinium resorbable by the resin. Re-elution of the protactinium with mineral acids was slow, but the re-employment of the hydrochloric acid-hydrofluoric acid elutriant produced a marked concentration of the product.
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