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| Nominal Added Concentration (µg/ml) | Sample Number | Recovery (%) | Mean (SD) |
| 10 | 1 | 90.11 | 95.17 (4.40) |
| 2 | 97.32 | ||
| 3 | 98.09 | ||
| 5 | 1 | 97.20 | 94.08 (4.33) |
| 2 | 89.14 | ||
| 3 | 95.89 | ||
| 0.2 | 1 | 101.00 | 96.47 (6.46) |
| 2 | 93.34 | ||
| 3 | 89.08 |
