Extractant

Initial pH

Final pH

Extraction (%)

Separation factor

La

Ce

Pr

Nd

Ce/La

Pr/Ce

Nd/Pr

P507

0.5

0.5

0.7

1.8

6

7

3.5

3.2

1.2

P507

1.0

1.0

5.0

16

37

40

3.9

3.2

1.2

P507

2.0

1.9

13

37

66

70

4.1

3.2

1.2

D2EHPA

0.5

0.5

17

38

61

64

3.1

2.7

1.1

D2EHPA

1.0

1.0

36

64

80

82

3.2

2.3

1.1

D2EHPA

1.5

1.4

65

86

93

94

3.3

2.2

1.1