Characterization of extraction of chromatographic materials containing bis(2-ethyl-1-hexyl) phosphoric acid, 2-ethyl-1-hexyl (2-ethyl-1-hexyl) phosphonic acid, and bis(2,4,4-trimethyl-1-pentyl) phosphinic acid

This work describes the uptake of a wide range of metal ions, including alkaline earths, transition metals, post-transition metals, lanthanides and actinides, from acidic nitrate and chloride media on extraction chromatographic resins prepared from three different acidic organophosphorus compounds: bis(2-ethyl-1-hexyl) phosphoric acid (HDEHP), 2-ethyl-1-hexyl(2-ethyl-1-hexyl) phosphonic acid, (HEH[EHP]) and bis(2,4,4-trimethyl-1-pentyl) phosphinic acid (H[DTMPP]). The data is plotted in a format allowing for the easy comparison of the uptake of all metal ions under a given condition. Additionally, examples of several novel separations using the three extraction chromatographic materials are discussed.