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. 2023 May 18:1–16. Online ahead of print. doi: 10.1007/s10967-023-08928-y

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Fig. 11 — Previous reported data on Pa and Nb separations using strongly basic anion exchange resin with mixed HCl–HF solutions. A higher elution constant indicates weaker adsorption to resin. A solution of 9 M HCl + 0.02 M HF yields the greatest separation between Pa and Nb. All data are from Kraus and Moore (1951) using Dowex 1 in Cl⁻ form [27]. Both Dowex 1 (made by Dow Chemical) and AG 1 (made by Bio-Rad and Eichrom) are monofunctional strongly basic anion exchange resins and are recognized as functionally equivalent [31]