Table 2.
Inter- and intra-day imprecision and accuracy for quality controls at 10 and 100 ng/L.
| Imprecision (%) |
Accuracy (%) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Inter-day (n = 5) |
Intra-day (n = 4) |
Inter-day (n = 5) |
Intra-day (n = 4) |
|||||
| Compound | 10 (ng/L) | 100 (ng/L) | 10 (ng/L) | 100 (ng/L) | 10 (ng/L) | 100 (ng/L) | 10 (ng/L) | 100 (ng/L) |
| Morphine | 11.4 | 6.2 | 5.6 | 3.4 | 93.3 | 94.7 | 116.0 | 110.9 |
| Oxymorphone | 10.8 | 3.9 | 4.9 | 3.3 | 106.5 | 106.6 | 126.5 | 109.1 |
| Hydromorphone | 14.1 | 3.3 | 12.9 | 4.4 | 98.3 | 103.3 | 119.5 | 121.1 |
| Oxycodone | 8.9 | 7.6 | 10.9 | 5.0 | 98.3 | 101.1 | 110.0 | 102.0 |
| Hydrocodone | 10.0 | 8.8 | 6.1 | 4.8 | 107.5 | 103.7 | 131.0 | 127.2 |
| THC | 9.7 | 9.0 | 21.2 | 7.9 | 102.8 | 98.8 | 110.3 | 106.6 |
| THCCOOH | 8.0 | 6.1 | 5.0 | 7.3 | 97.3 | 105.6 | 119.3 | 103.4 |
| THCCOOH-glucuronide | 6.0 | 10.2 | 4.1 | 5.5 | 95.0 | 98.9 | 83.0 | 102.3 |