| 1 | 2 | 3 | 4 |
C | 74.72 ± 0.11 | 57.86 ± 0.12 | 41.85 ± 0.14 | 37.93 ± 0.14 |
O | 24.67 ± 0.11 | 40.01 ± 0.12 | 52.85 ± 0.14 | 57.40 ± 0.14 |
Ca | 0.44 ± 0.01 | 1.80 ± 0.02 | 4.66 ± 0.03 | 3.99 ± 0.03 |
Na | 0.03 ± 0.01 | 0.14 ± 0.02 | 0.31 ± 0.02 | 0.30 ± 0.02 |
Mg | --- | 0.04 ± 0.01 | 0.05 ± 0.01 | 0.04 ± 0.02 |
S | --- | --- | --- | --- |
Cl | 0.14 ± 0.01 | 0.06 ± 0.01 | 0.05 ± 0.01 | 0.03 ± 0.01 |
Ni | --- | 0.03 ± 0.01 | --- | 0.02 ± 0.01 |
Sr | --- | 0.06 ± 0.02 | 0.24 ± 0.03 | 0.29 ± 0.03 |