Table 1.
Comparison of limits of detection (LOD) and sensitivity values with respect to DA, AA, and UA as determined by amperometric and DPV analysis.
| Targets | DA | AA | UA | |
|---|---|---|---|---|
| Amperometry | Linear regression equation | ip (μA) = 7.6 × 10−8 + 0.43C (μM) R2 = 0.954 (0.14–100 μM), ip (μA) = 1.4 × 10−8 + 0.023C (μM) R2 = 0.968 (100–700 μM) |
ip (μA) = 4.8 × 10−8 + 0.0081 C (μM) R2 = 0.988 |
ip (μA) = 2.1 × 10−8 + 0.0035 C (μM) R2 = 0.979 |
| LOD (μM) | 0.14 | 9.5 | 25 | |
| Sensitivity (μA·μM−1) | 0.43 | 8.1 × 10−3 | 3.5 × 10−3 | |
| DPV | Linear regression equation | ip (μA) = 1.8 × 10−7 + 0.27 C (μM) R2 = 0.935 |
ip (μA) = 1.2 × 10−7 + 0.0031 C (μM) R2 = 0.989 |
ip (μA) = 6.0 × 10−7 + 0.051 C (μM) R2 = 0.977 |
| LOD (μM) | 0.69 | 5.7 | 2.2 | |
| Sensitivity (μA·μM−1) | 0.27 | 3.1 × 10−3 | 0.051 | |