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| Interfering substances | Concentration (μmol L−1) | Relative deviation (%) |
|---|---|---|
| Na+ | 500.0 | 1.36 |
| Cl− | 500.0 | −1.58 |
| K+ | 500.0 | 3.49 |
| Fe3+ | 500.0 | 2.40 |
| Ca2+ | 500.0 | 2.39 |
| Alanine | 500.0 | 4.09 |
| Glutamine | 500.0 | 1.5 |
| Glucose | 500.0 | 2.5 |
| Quercetin | 50.0 | 12.42 |
| Quercetin | 5.0 | 2.46 |
| Baicalin | 50.0 | 55.1 |
| Baicalin | 5.0 | 3.76 |
| Rutin | 50.0 | 68.6 |
| Rutin | 1.0 | 5.42 |
