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 |