S. Tsukahara et al., SYNERGIC EXTRACTION EQUILIBRIUM AND SUBSTOICHIOMETRIC EXTRACTION OF IRON(II) WITH 2-THENOYLTRIFLUOROACETONE AND TRIOCTYLPHOSPHINE OXIDE, Radiochimica Acta, 65(4), 1994, pp. 245-248
The synergic extraction of iron(II) was carried out with 2-thenoyltrif
luoroacetone (Htta) and trioctylphosphine oxide (topo) into heptane. T
he extracted species was considered to be Fe(tta)2(topo) and Fe(tta)2(
topo)2, and the synergic extraction constants were obtained. The subst
oichiometric extraction of iron(II) was first attained in the above ex
traction system within 30 min. Its reproducibility was high (RSD 1.0%)
in the Fe2+ range of 18.7-192 mug.