Extraction of zirconium and hafnium thiocyanate with polyurethane foam.

@article{JinChun1987ExtractionOZ,
  title={Extraction of zirconium and hafnium thiocyanate with polyurethane foam.},
  author={L Jin-Chun and Albert Chow},
  journal={Talanta},
  year={1987},
  volume={34 3},
  pages={331-5}
}
Conditions for the extraction of zirconium and hafnium thiocyanate by polyether-type polyurethane foam were studied in detail. The composition of the extractable species was found to be dependent on both the thiocyanate and metal-ion concentrations. The extraction efficiency for zirconium and hafnium depended on the size of the counter-cation as well as on the type of anion.