Table 1.
Calibration curves and performance characteristics of the headspace-gas chromatography (HS-GC) coupled with mass spectrometry (MS) and ion mobility spectrometry (IMS) methods.
| HS-GC-MS | HS-GC-IMS | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Analyte | RT (min) | Linear Dynamic Range (µg g−1) | R2 | LOQ | RT (s) | Drift Time Monomer (ms) | Drift Time Dimer (ms) | Logarithmic Dynamic Range (µg g−1) | R2 | LOQ |
| Ethyl acetate | - | - | - | - | 276.2 | 9.0 | 11.0 | 0.08–20 | 0.985 | 0.08 |
| 1-penten-3-one | - | - | - | - | 328.7 | 8.8 | 10.7 | 0.08–20 | 0.989 | 0.08 |
| 2-pentanone | - | - | - | - | 334.6 | 9.2 | 11.3 | 0.15–50 | 0.993 | 0.15 |
| 4-methyl-pentan-2-one | - | - | - | - | 396.9 | 9.6 | 12.2 | 0.10–50 | 0.990 | 0.10 |
| Hexanal | 5.2 | 0.90–50 | 0.987 | 0.90 | 462.3 | 10.3 | 12.8 | 0.75–50 | 0.999 | 0.75 |
| Trans-2-pentenal | - | - | - | - | 411.8 | 9.1 | 11.2 | 0.82–50 | 0.993 | 0.82 |
| Trans-2-hexen-1-al | 6.3 | 0.38–50 | 0.995 | 0.38 | 554.4 | 9.6 | 12.4 | 0.15–50 | 0.984 | 0.15 |
| Heptanal | - | - | - | - | 631.6 | 10.8 | 13.8 | 0.42–50 | 0.976 | 0.42 |
| 6-methyl-5-hepten-2-one | 8.9 | 0.44–50 | 0.993 | 0.44 | - | - | - | - | - | - |
| 3-hexenyl acetate | 9.2 | 0.48–50 | 0.995 | 0.48 | - | - | - | - | - | - |
| Nonanal | 10.8 | 0.20–50 | 0.996 | 0.20 | 989.0 | 12.0 | ND | 0.10–50 | 0.920 | 0.10 |
| Decanal | 12.4 | 1.55–50 | 0.996 | 1.55 | - | - | - | - | - | - |
| Trans-2-decenal | 14.4 | 2.10–50 | 0.985 | 2.10 | - | - | - | - | - | - |
| Hexyl acetate | ND | ND | ND | ND | 830.6 | 11.3 | 15.5 | 0.21–20 | 0.993 | 0.21 |
Calibration curves only were constructed for the compounds identified in olive oil samples. RT: Retention time, LOQ: Limits of quantification.