| Theoretical Concentration (μg/mL) | Determined* (μg/mL) | Precision (%RSD) | Accuracy (%) | |||
| Original* | Added | Total* | Intra-day | Inter-day | Intra-day | |
| 11.1 | 5.0 | 16.1 | 16.1 | 0.42 | 0.90 | 99.7 |
| 11.1 | 10.0 | 21.1 | 21.4 | 0.85 | 1.44 | 100.8 |
| 11.1 | 20.0 | 31.1 | 31.1 | 0.51 | 1.67 | 98.9 |