Table 3.
Intraday (n = 5) and interday (n = 15) precision (measured as coefficient of variation, CV%) and accuracy (measured as % error) for analytes under investigation in oral fluid samples.
| Analyte | Intraday precision | Intraday accuracy | Interday precision | Interday accuracy | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low QC | Medium QC | High QC | Low QC | Medium QC | High QC | Low QC | Medium QC | High QC | Low QC | Medium QC | High QC | |
| A | 7.6 | 12.0 | 14.8 | 5.9 | 10.5 | 8.0 | 13.1 | 1.5 | 9.8 | 10.6 | 3.5 | 10.8 |
| MA | 14.8 | 3.1 | 11.7 | 6.4 | 9.3 | 7.4 | 10.2 | 7.8 | 4.4 | 10.4 | 9.7 | 8.0 |
| MDA | 5.3 | 8.2 | 5.9 | 6.2 | 10.3 | 11.6 | 9.6 | 2.4 | 8.8 | 10.5 | 8.5 | 9.4 |
| Ketamine | 9.2 | 7.1 | 9.5 | 4.3 | 11.1 | 10.3 | 8.5 | 7.4 | 10.1 | 10.1 | 8.8 | 10.3 |
| MDMA | 6.5 | 10.8 | 10.8 | 8.3 | 9.7 | 6.9 | 9.4 | 1.7 | 5.5 | 9.1 | 9.5 | 7.2 |
| MDE | 4.1 | 10.5 | 8.0 | 2.9 | 10.6 | 11.8 | 9.8 | 3.4 | 8.0 | 10.8 | 7.3 | 7.4 |
| MBDB | 10.6 | 5.1 | 9.4 | 3.4 | 10.4 | 10.7 | 11.5 | 12.3 | 7.4 | 12.2 | 10.6 | 10.2 |
| Methadone | 11.3 | 5.6 | 8.3 | 8.9 | 10.5 | 11.5 | 12.4 | 5.1 | 11.6 | 7.8 | 4.9 | 11.8 |
| Cocaine | 7.4 | 9.8 | 7.2 | 8.7 | 3.5 | 6.2 | 5.5 | 6.6 | 7.2 | 8.6 | 7.5 | 6.6 |
| Cocaethylene | 9.5 | 4.4 | 7.4 | 8.2 | 9.1 | 4.3 | 8.7 | 2.5 | 6.9 | 5.0 | 4.3 | 10.0 |
| THC | 11.8 | 8.8 | 10.2 | 5.9 | 10.8 | 8.0 | 10.2 | 1.6 | 11.8 | 4.8 | 5.2 | 8.7 |
| Codeine | 10.0 | 10.1 | 11.8 | 4.8 | 9.1 | 7.4 | 10.6 | 6.5 | 9.8 | 11.3 | 9.9 | 10.8 |
| Morphine | 6.5 | 7.8 | 10.1 | 5.3 | 7.8 | 11.6 | 13.1 | 3.5 | 4.4 | 6.8 | 3.5 | 10.8 |
| 6-MAM | 6.2 | 8.0 | 10.0 | 1.9 | 8.6 | 9.8 | 10.2 | 7.4 | 8.8 | 9.9 | 9.7 | 8.0 |
A, amphetamine; MA, methamphetamine; MDA, 3,4-methylenedioxyamphetamine; MDMA, 3,4-methylenedioxymethamphetamine; MDEA, 3,4-methylenedioxy-N-ethylamphetamine; MBDB, N-methyl-1-(1,3-benzodioxol-5-yl)-2-butanamine; THC, Δ9-Tetrahydrocannabinol.