Table 4: Amperometric determination of low levels AA using proposed electrode in diluted AA containing serum samples.
| Sample | Added (nM) | Found (nM) | Recovery (%) |
| Serum sample 1 | 0 | 64.1 (± 3.89) | - |
| 45 | 107.7 (± 5.05) | 97.1 | |
| 97.5 | 158.9 (± 6.84) | 97.8 | |
| Serum sample 2 | 0 | 30.6 (± 1.82) | - |
| 40 | 68.4 (± 3.17) | 98.2 | |
| 175 | 207.8 (± 8.44) | 101.0 | |
| Serum sample 3 | 0 | 145.6 (± 6.70) | - |
| 37.5 | 185.5 (± 8.14) | 103.4 | |
| 325 | 466.1 (± 14.35) | 98.3 |