H+ (mol∙L−1)

Separation factor(SF) Zr/Hf

DEHPA

IONQUEST®801

CYANEX®272

1.0

1.2

1.1

22.9

2.0

1.3

1.1

22.1

3.0

1.2

1.2

23.3

4.0

1.6

1.2

31.0

5.0

1.2

1.2

22.0