GC-MS data on the absence (✗) and presence (✓) of atmospheric VOCs adsorbed on different CNT sorbents that had been left inside thermal desorption tubes in ambient air for 72 hours.
| Target analytes | Qualifier ionsa | t R b (min) | VOCs detected in CNT sorbents | |||||
|---|---|---|---|---|---|---|---|---|
| Q1 | Q2 | MWCNT | COOH-MWCNT | SWCNT | COOH-SWCNT | sSWCNT | ||
| Isopropyl alcohol | 43 (17) | 59 (5) | 8.21 | ✗ | ✗ | ✓ | ✗ | ✗ |
| Ethyl ether | 45 (65) | 73 (12) | 8.8 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Isoprene | 68 (69) | 53 (54) | 9.11 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Dichloromethane | 49 (90) | 86 (65) | 10.27 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2-Methylpentane | 43 (100) | 42 (53) | 13.01 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Methacrolein | 41 (84) | 39 (73) | 13.25 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3-Methylpentane | 56 (87) | 41 (52) | 13.63 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hexane | 41 (60) | 43 (51) | 14.21 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2-Butanone | 43 (100) | 57 (8) | 14.26 | ✗ | ✗ | ✓ | ✗ | ✓ |
| Trichloromethane | 85 (67) | 47 (17) | 14.7 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Ethyl acetate | 61 (19) | 70 (15) | 14.79 | ✗ | ✗ | ✓ | ✓ | ✓ |
| Methylcyclopentane | 69 (48) | 41 (42) | 15.05 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Cyclohexane | 56 (95) | 41 (43) | 15.98 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Benzene | 77 (22) | 51 (12) | 16.16 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Heptane | 43 (100) | 57 (64) | 16.89 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Trichloroethylene | 132 (97) | 134 (31) | 16.97 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Methyl methacrylate | 41 (85) | 39 (46) | 17.27 | ✗ | ✗ | ✗ | ✗ | ✗ |
| Methyl cyclohexane | 55 (61) | 98 (46) | 17.58 | ✓ | ✓ | ✓ | ✗ | ✓ |
| Methyl isobutyl ketone | 58 (48) | 85 (25) | 17.95 | ✗ | ✗ | ✗ | ✗ | ✗ |
| Pyridine | 52 (47) | 51 (21) | 18.1 | ✗ | ✗ | ✗ | ✗ | ✗ |
| 2-Methylheptane | 43 (78) | 70 (26) | 18.37 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Toluene | 92 (64) | 65 (10) | 18.7 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1-Octene | 41 (77) | 70 (90) | 18.88 | ✗ | ✗ | ✗ | ✓ | ✓ |
| Octane | 85 (71) | 57 (49) | 19.04 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Hexanal | 57 (71) | 72 (33) | 19.14 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Tetrachloroethylene | 164 (77) | 129 (65) | 19.58 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Furfural | 95 (91) | 39 (33) | 19.95 | ✗ | ✗ | ✓ | ✓ | ✓ |
| Ethylbenzene | 106 (38) | 77 (8) | 20.63 | ✓ | ✓ | ✓ | ✓ | ✓ |
| m,p-Xylene | 106 (56) | 77 (12) | 20.86 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Nonane | 43 (91) | 85 (48) | 21 | ✗ | ✗ | ✓ | ✓ | ✓ |
| Heptanal | 55 (66) | 57 (55) | 21.16 | ✗ | ✗ | ✓ | ✓ | ✓ |
| Styrene | 103 (46) | 78 (37) | 21.29 | ✓ | ✓ | ✓ | ✓ | ✓ |
| o-Xylene | 106 (54) | 105 (21) | 21.39 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Phenol | 66 (24) | 65 (20) | 22.38 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3-Ethyltoluene | 120 (42) | 91 (14) | 22.6 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 4-Ethyltoluene | 120 (39) | 91 (12) | 22.68 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Benzaldehyde | 106 (97) | 77 (87) | 22.74 | ✗ | ✗ | ✓ | ✓ | ✓ |
| 1,3,5-Trimethylbenzene | 120 (62) | 91 (11) | 22.85 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Decane | 43 (74) | 71 (45) | 22.9 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 2-Ethyltoluene | 120 (42) | 91 (13) | 23.05 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Octanal | 43 (94) | 57 (94) | 23.13 | ✗ | ✗ | ✗ | ✓ | ✗ |
| Benzonitrile | 76 (32) | 50 (10) | 23.18 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1,2,4-Trimethylbenzene | 120 (59) | 91 (11) | 23.41 | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1,2,3-Trimethylbenzene | 120 (51) | 91 (10) | 24.03 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Acetophenone | 77 (66) | 120 (27) | 24.82 | ✓ | ✓ | ✓ | ✗ | ✓ |
| Nonanal | 41 (70) | 70 (40) | 25.03 | ✗ | ✗ | ✗ | ✗ | ✗ |
| Decanal | 41 (81) | 70 (58) | 27.03 | ✗ | ✗ | ✗ | ✗ | ✗ |
a
Identity and () relative abundance of qualifier ions.
b
Retention times of the analytes.