| Element |
|
Sample |
|
| First wash |
Fifth wash |
Tenth wash |
|
| O |
47.3 |
50.9 |
63.2 |
| Na |
23.7 |
15.40 |
0.09 |
| Al |
10.6 |
20.3 |
36.20 |
| S |
18.0 |
13.0 |
0.26 |
| Other |
0.40 |
0.40 |
0.25 |