Table 5. Anti-interference of foreign species on the determination of NA (10.0 µM) at β-CD/AB/GCE (n = 3).
| Category | Interferent | Interferent concentration/NA ratio | Signal change for NA (%) |
|---|---|---|---|
| Biological | Ascorbic acid (AA) | 1.0 mM (100-fold) | 2.3 |
| Biological | Uric acid (UA) | 1.0 mM (100-fold) | −1.8 |
| Biological | Dopamine (DA) | 1.0 mM (100-fold) | 1.7 |
| Biological | Glucose | 5.0 mM (500-fold) | 1.2 |
| Electrolyte | Na+ | 5.0 mM (500-fold) | −1.3 |
| Electrolyte | K+ | 5.0 mM (500-fold) | 0.9 |
| Electrolyte | Ca2+ | 5.0 mM (500-fold) | −1.6 |
| Electrolyte | Mg2+ | 5.0 mM (500-fold) | 1.5 |
| Electrolyte | Cl− | 5.0 mM (500-fold) | −0.8 |
| Electrolyte | NO3− | 5.0 mM (500-fold) | 0.6 |
| Electrolyte | SO42− | 5.0 mM (500-fold) | −1.1 |
| Heavy metal | Cu2+ | 0.50 mM (50-fold) | −3.5 |
| Heavy metal | Pb2+ | 0.50 mM (50-fold) | 3.1 |
| Heavy metal | Zn2+ | 0.50 mM (50-fold) | −2.7 |