Metal ion

0.05 M HFAc + 0.05 M TOPO

0.05 M TFA + 0.05 M TOPO

Kerosene

SF

[Bmim][TF2N]

SF

Kerosene

SF

[Bmim][TF2N]

SF

%La(III)

70.02 ± 1.17

1.45 ± 0.01

63.39 ± 1.26

4.96 ± 0.05

14.49 ± 1.76

3.54 ± 0.42

33.40 ± 0.19

4.23 ± 0.12

%Ce(III)

76.36 ± 0.85

89.57 ± 0.59

37.55 ± 0.58

67.96 ± 0.43