Table 4.
Interassay mean and standard deviation (SD) of validation samples.
| Drug/Metabolite | LLOQ (ng/mL) | LQC (ng/mL) | MQC (ng/mL) | HQC (ng/mL) |
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | |
| Amphetamine∗ | 5.4 ± 0.5 | 16.7 ± 0.7 | 581.5 ± 24.6 | 802.4 ± 64.4 |
| Methamphetamine∗ | 5.1 ± 0.4 | 15.1 ± 0.5 | 585.6 ± 25.9 | 1837 ± 85.7 |
| D-amphetamine | 2.8 ± 0.1 | 8.3 ± 0.4 | 295.5 ± 14.8 | 940.3 ± 33.4 |
| L-amphetamine | 2.8 ± 0.1 | 8.4 ± 0.3 | 294.5 ± 6.1 | 874.7 ± 25.7 |
| D-methamphetamine | 2.6 ± 0.1 | 7.6 ± 0.3 | 300.6 ± 12.1 | 999.5 ± 48.9 |
| L-methamphetamine | 2.6 ± 0.1 | 7.7 ± 0.4 | 301.6 ± 16.1 | 1013.9 ± 51.4 |
∗ Indicates combined D- and L-.