Table 2.
Linearity of the HS-SPME-GC-MS procedure for compounds under investigation.
| Compounds | Slope | Intercept | R 2 | LOD (ng/pad) | LOQ (ng/pad) | Analytical recovery (%) |
|---|---|---|---|---|---|---|
| A | 0.64 | 0.07 | 0.995 | 0.37 | 1.11 | 100.8 |
| MA | 2.08 | 0.20 | 0.990 | 0.68 | 2.04 | 99.2 |
| MDA | 1.93 | −0.16 | 0.988 | 0.60 | 1.80 | 88.8 |
| Ketamine | 6.47 | −1.16 | 0.990 | 0.73 | 2.19 | 84.4 |
| MDMA | 5.57 | 0.86 | 0.996 | 0.34 | 1.02 | 100.8 |
| MDE | 5.73 | 0.14 | 0.998 | 0.26 | 0.78 | 103.2 |
| MBDB | 8.34 | 0.77 | 0.999 | 0.11 | 0.33 | 98.8 |
| Methadone | 9.74 | −1.46 | 0.990 | 0.71 | 2.13 | 85.5 |
| Cocaine | 6.18 | 0.05 | 0.996 | 0.35 | 1.05 | 107.6 |
| Cocaethylene | 2.01 | −0.42 | 0.992 | 0.51 | 1.53 | 90.4 |
| THC | 10.52 | 0.03 | 0.990 | 0.06 | 0.18 | 102.0 |
| Codeine | 4.73 | 0.63 | 0.996 | 0.06 | 0.18 | 96.0 |
| Morphine | 7.32 | 2.05 | 0.995 | 0.43 | 1.29 | 96.4 |
| 6-MAM | 9.52 | 3.74 | 0.993 | 0.39 | 1.17 | 105.6 |
A, amphetamine; MA, methamphetamine; MDA, methylenedioxyamphetamine; MDMA, methylenedioxymethamphetamine; MDE, methylenedioxyethamphetamine; MBDB, N-methyl-1-(1,3-benzodioxol-5-yl)-2-butanamine; THC, Δ9-Tetrahydrocannabinol; 6-MAM, 6-monoacetylmorphine.