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| Hg (mg/L) | Pb (mg/L) | Fe (mg/L) | |
| Concentration of ions in the mixture before the experiment | 1.03 | 1.02 | 0.99 |
| Concentration of ions in the mixture after the experiment | 0.06 | 0.11 | 0.2 |
| Concentration of ions attached on sensing layer after the experiment | 0.96 | 0.84 | 0.71 |
