Sample

Cation concentration (mg∙L⁻¹)^b

K⁺

Ca²⁺

Na⁺

Sr²⁺

Mg²⁺

1

8.2

34.8

5.7

0.5

36.3

2

ND

69.2

3.8

0.8

10.9

3

3.1

2.7

4.5

0.6

ND

4

2.9

54.2

43.9

0.6

9.4

5

4.3

21.9

15.5

ND

8.2

6

0.61

51.7

2.1

ND

5.4