Trace Elements (ppm) | Mean | Range | MRL (ppm)1 |
Ba | 20 | 8 - 38 | 0.2 |
Co | 76 | 65 - 88 | 0.01 |
Cr | 2486 | 1772 - 3290 | 0.005 |
Cu | 26 | 3 - 70 | 0.01 |
Ni | 1246 | 833 - 1568 | 2 * 10−7 |
Pb | 0.72 | 0.2 - 2 | No safe threshold |
Rb | 2 | 0.3 - 10 | - |
Sr | 12 | 5 - 35 | 2 |
V | 48 | 33 - 65 | 0.01 |
Zn | 16 | 6 - 34 | 0.3 |