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Effect of different supporting electrolytes (0.1 M) on the current and potential response of 10 μM rutin at NH2-Fe3O4 NPs-ErGO/GCE. Accumulation time: 30s, other conditions are the same as in Figure 5.
| Electrolyte | Peak Current (μA) | Peak Potential (V) |
|---|---|---|
| HAc-NaAc buffer (pH 4.0) | 4.275 | 0.540 |
| HAc-NH4Ac (pH 4.0) | 4.645 | 0.564 |
| (CH2)6N4-HCl (pH 5.0) | 3.688 | 0.528 |
| phosphate buffer (pH 6.0) | 3.951 | 0.480 |
| NH3-NH4Cl (pH 9.0) | 1.264 | 0.432 |
| HCl | 6.200 | 0.648 |
| HNO3 | 6.418 | 0.660 |
| H2SO4 | 6.863 | 0.664 |
| NaOH | 0.645 | 0.328 |
