| Concentrations of QC samples (μg/mL) | Sample number | Found concentrations (μg/mL) | Recovery (%) | Mean ± SD (%) |
|---|---|---|---|---|
| 0.5 | 1 | 0.34 | 68.76 | 70.08 ± 1.41 |
| 2 | 0.36 | 72.03 | ||
| 3 | 0.35 | 69.44 | ||
| 4 | 0.35 | 69.09 | ||
| 5 | 0.36 | 71.07 | ||
| 10 | 1 | 8.51 | 85.07 | 81.99 ± 3.30 |
| 2 | 8.28 | 82.84 | ||
| 3 | 7.81 | 78.05 | ||
| 4 | 8.50 | 84.96 | ||
| 5 | 7.90 | 79.01 | ||
| 20 | 1 | 15.86 | 79.28 | 80.19 ± 2.51 |
| 2 | 16.70 | 83.51 | ||
| 3 | 15.56 | 77.79 | ||
| 4 | 15.65 | 78.24 | ||
| 5 | 16.43 | 82.14 |