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| Samples | Initial (mg L−1) | Spiked (mg L−1) | Found (mg L−1) | Recovery (%) | RSD (%) |
|---|---|---|---|---|---|
| FA tablets (n = 3) | 41.7 | 8 | 50.3 | 107.5 | 1.2 |
| 41.7 | 20 | 61.0 | 96.5 | 5.2 | |
| 41.7 | 32 | 70.6 | 90.3 | 3.0 | |
| Urine (n = 3) | n.d.a | 44 | 46.53 | 105.7 | 4.2 |
| n.d. | 77 | 68.78 | 89.3 | 6.8 | |
| n.d. | 110 | 90.18 | 82.0 | 8.4 |
n.d., not detected or lower than limits of detection.
