Separation of 43Sc from 43Ca

The chemical separation of ⁴³Sc from ⁴³Ca was performed as for the previously reported procedure for ⁴⁴Sc (van der Meulen et al. 2015). In brief, the irradiated target was dissolved in HCl and the separation of ⁴³Sc performed on a DGA extraction chromatographic column. ⁴³Sc was directly eluted onto a SCX cation exchange resin cartridge, from where it was eluted in a small volume of NaCl/HCl and directly used for radiolabeling.