Table 4: The lanthanum used for the preparation of Zn-La magnetite nanoparticles.
| X ratio | La%TH | La % ICP |
| 0.0 O2 | 0 | |
| 0.0 N2 | 0 | |
| 0.1 O2 | 3.38 | 2.66 |
| 0.1 N2 | 3.38 | 2.9 |
| 0.15 O2 | 4.9 | 2.38 |
| 0.15 N2 | 4.9 | 4.72 |
| 0.2 O2 | 6.4 | 6.02 |
| 0.2 N2 | 6.4 | 6.28 | 0.25 O2 | 7.7 | 7.92 |
| 0.25 N2 | 7.7 | 7.6 | 0.3 O2 | 9.03 | 7.52 |
| 0.3 N2 | 9.03 | 8.6 |