Table 4.
Analytical features of HS-GC-MS determination of studied VOCs for each adsorbent evaluated.
| Compound | Veram | XAD-2 | XAD-4 | XAD-16 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| RSD | LOD | RSD | LOD | b | RSD | LOD | b | RSD | LOD | b | |
| (%) | ng · sampler−1 | (%) | ng · sampler−1 | (×10−3) | (%) | ng · sampler−1 | (×10−3) | (%) | ng · sampler−1 | (×10−3) | |
| Chloroform | 5 | 50 | 13 | 31 | 1.96 | 9 | 30 | 2.04 | 9 | 37 | 2.03 |
| 1,2-Dichloroethane | 9 | 50 | 23 | 30 | 0.91 | 12 | 73 | 0.85 | 38 | 13 | 0.87 |
| Benzene | 7 | 10 | 9 | 1 | 3.77 | 10 | 4 | 3.66 | 10 | 4 | 3.72 |
| Cyclohexane | 5 | 50 | 10 | 130 | 0.82 | 3 | 130 | 0.70 | 12 | 39 | 1.08 |
| Trichloroethylene | 6 | 50 | 5 | 3 | 2.17 | 4 | 4 | 1.99 | 12 | 23 | 1. 95 |
| Bromodichloromethane | 6 | 50 | 7 | 10 | 1.32 | 4 | 95 | 1.03 | 14 | 140 | 1.11 |
| Toluene | 6 | 10 | 5 | 11 | 6.48 | 47 | 90 | 7.61 | 22 | 58 | 5.49 |
| Tetrachloroethylene | 5 | 10 | 4 | 17 | 3.22 | 7 | 41 | 2.96 | 18 | 29 | 2.85 |
| Dibromochloromethane | 6 | 50 | 4 | 15 | 2.50 | 7 | 28 | 1.71 | 19 | 19 | 1.64 |
| Ethylbenzene | 9 | 10 | 3 | 3 | 3.76 | 12 | 6 | 3.22 | 13 | 5 | 2.88 |
| m,p-Xylene | 13 | 10 | 6 | 14 | 3.28 | 11 | 12 | 2.79 | 17 | 10 | 2.44 |
| Bromoform | 15 | 50 | 1 | 2 | 0.99 | 15 | 8 | 0.65 | 19 | 7 | 0.75 |
| o-Xylene | 13 | 10 | 2 | 8 | 2.85 | 14 | 21 | 2.47 | 14 | 114 | 2.13 |
Note: RSD %: relative standard deviation for 3 independent determinations (c = 1500 ng · sampler−1); LOD: Limit of detection expressed in ng · sampler−1; b: slope of calibration curve expressed in relative units.