| Sample No. | Copper | Nickel |
| S1 | 167 ± 0.01 | 2.8 ± 0.00 |
| S2 | 337.4 ± 0.02 | 10.2 ± 0.01 |
| S3 | 7.2 ± 0.00 | 10.2 ± 0.02 |
| S4 | ND | 1.4 ± 0.00 |
| S5 | 0.6 ± 0.00 | 6 ± 0.01 |
| S6 | 4.4 ± 0.00 | 11.8 ± 0.01 |
| S7 | ND | 0.8 ± 0.00 |
| S8 | ND | ND |
| S9 | ND | 8 ± 0.00 |
| S10 | ND | ND |
| S11 | 8 ± 0.00 | 14.8 ± 0.01 |
| S12 | ND | 6.6 ± 0.017 |