Table 1.
Comparison of sensitivities and LODs for DC-mode and RF-mode of all investigated VOCs. LODs were calculated for 1 s of integration time. The DC-mode data were collected at Edrift = 66 V/cm, RF = 0 Vp-p, and DC = 66 V/cm under humid conditions. The RF-mode data were collected at Edrift = 66 V/cm, RF = 120 Vp-p, and DC = 13.5 V/cm under humid conditions
| Sensitivity (cps ppbV−1) | LOD (ppbV) | |||||
|---|---|---|---|---|---|---|
| Compound (m/z) | DC-mode | RF-mode | RF-mode/DC-mode | DC-mode | RF-mode | RF-mode/DC-mode |
| Methanol (33) | 27.5 | 116.5 | 4.2 | 0.735 | 0.432 | 1.7 |
| Acetonitrile (42) | 46.7 | 418.2 | 8.6 | 0.337 | 0.11 | 3.1 |
| Acetaldehyde (45) | 56.5 | 458.1 | 8.1 | 0.66 | 0.245 | 2.7 |
| Ethanol (47) | 3.4 | 18.2 | 5.3 | 12.319 | 8.31 | 1.5 |
| 2-Propenal (57) | 43 | 406.3 | 9.4 | 0.301 | 0.146 | 2.1 |
| Acetone (59) | 103.6 | 1008.3 | 9.7 | 0.26 | 0.09 | 2.9 |
| Isoprene (69) | 10 | 120.8 | 12.1 | 1.226 | 0.463 | 2.6 |
| 2-Butenal (71) | 65.8 | 701 | 10.7 | 0.163 | 0.069 | 2.4 |
| 2-Butanone (73) | 66.1 | 750.9 | 11.4 | 0.325 | 0.104 | 3.1 |
| Benzene (79) | 39.2 | 423.6 | 10.8 | 0.22 | 0.056 | 3.9 |
| Toluene (93) | 50.2 | 620.3 | 12.4 | 0.144 | 0.06 | 2.4 |
| o-Xylene (107) | 65.4 | 747.4 | 11.4 | 0.115 | 0.03 | 3.8 |
| Chlorobenzene (113) | 38.2 | 413.7 | 10.8 | 0.155 | 0.061 | 2.5 |
| α-Pinene (137) | 25.7 | 252.1 | 9.8 | 0.265 | 0.087 | 3 |
| 1,2-Dichlorobenzene (147) | 43.9 | 264.7 | 6.0 | 0.087 | 0.044 | 2 |