Table 2.
Average retention times and calculated reduced ion mobilities (K0) with standard deviations, numbers of replications (n) for identified compounds measured in gas standards and in skin samples using GC–IMS.
| Substance | CAS | Retention time (gas standards) n = 14 (s) |
Reduced mobilities K0 (gas standards) n = 14 (cm2 V−1 s−1) |
Retention time (sample) n = 30 (s) |
Reduced mobilities K0 (sample) n = 30 (cm2 V−1 s−1) |
|---|---|---|---|---|---|
| 3-Methyl-2-butenal | 598-75-4 | 10.7 ± 0.4 | 1.201 ± 0.018 | 10.8 ± 0.3 | 1.220 ± 0.010 |
| Sec-butylacetate | 105-46-4 | 12.7 ± 0.1 | 1.058 ± 0.022 | 12.8 ± 0.4 | 1.081 ± 0.024 |
| Benzaldehyde | 100-52-7 | 26.5 ± 0.7 | 1.149 ± 0.005 | 27.1 ± 0.3 | 1.145 ± 0.002 |
| 6-Methylhept-5-en-2-one | 110-93-0 | 31.4 ± 0.3 | 1.135 ± 0.007 | 31.6 ± 0.3 | 1.142 ± 0.006 |
| Octanal | 124-13-0 | 33.53 ± 0.8 | 0.949 ± 0.011 | 34.1 ± 0.2 | 0.952 ± 0.015 |
| 2-Ethyl-hexanol | 104-76-7 | 42.3 ± 0.8 | 0.936 ± 0.008 | 43.9 ± 0.7 | 0.951 ± 0.011 |
| Nonanal | 124-19-6 | 72.4 ± 0.5 | 0.904 ± 0.008 | 73.4 ± 0.4 | 0.909 ± 0.008 |
| Decanal | 112-31-2 | 172.7 ± 1.3 | 0.866 ± 0.009 | 174.4 ± 1.2 | 0.873 ± 0.008 |
| Ammonia | 7664-41-7 | 6.5 ± 0.4 | 1.953 ± 0.005 | 6.4 ± 0.3 | 1.955 ± 0.004 |
| Ethanol | 64-17-5 | 6.2 ± 0.3 | 1.526 ± 0.008 | 6.2 ± 0.2 | 1.516 ± 0.007 |