Comparative extraction of U(VI) by neutral and mono-acidic phosphates and phosphonates

Determination of trace quantities of uranium in biological materials by neutron activation analysis using a rapid radiochemical separation

“…A number of extraction systems were considered. However, the extensive literature on the solvent extraction mechanism of uranium(VI) using the reagent hydrogen bis(2-ethylhexyl)phosphate (HDEHP) (14)(15)(16)(17)(18)(19)(20)(21)(22)(23) indicated this reagent should be applicable to the extraction from strong acid solutions. Previous work in this laboratory had established the usefulness of this reagent for the extraction of many other elements over widely varying acid concentrations (23).…”