Table 2. GS-MS analyses of e-cigarette aerosols.
| Group | CAS number | Name | S/N ratio |
|---|---|---|---|
| Control | 57-55-6 | Propylene Glycol | 34.7 |
| 54-11-5 | Nicotine | 53.7 | |
| 20324-32-7 | 2-Propanol, 1-(2-methoxy-1-methylethoxy)- | 61.9 | |
| 101-84-8 | Diphenyl ether | 30.7 | |
| 487-19-4 | Nicotyrine | 17.2 | |
| Alcohol | |||
| 13588-28-8 | 1-Propanol, 2-(2-methoxypropoxy)- | 51.8 | |
| 22104-79-6 | 2-Nonen-1-ol | 7.62 | |
| 3944-36-3 | 2-Propanol, 1-(1-methylethoxy)- | 4.49 | |
| 116-09-6 | 2-Propanone, 1-hydroxy-(Hydroxyacetone) | 44.3 | |
| Aromatic hydrocarbon | |||
| 1014-60-4 | Benzene, 1,3-bis(1,1-dimethylethyl)- | 29.1 | |
| Sucralose (C12H19Cl3O8) | 57-55-6 | Propylene Glycol | 34.1 |
| 54-11-5 | Nicotine | 57.4 | |
| 20324-32-7 | 2-Propanol, 1-(2-methoxy-1-methylethoxy)- | 67 | |
| 101-84-8 | Diphenyl ether | 56.9 | |
| 487-19-4 | Nicotyrine | ||
| Alcohol | |||
| 22104-79-6 | *2-Nonen-1-ol | 7.18 | |
| Carboxylic acid | |||
| 55536-71-5 | *Di-tert-butyl 1,4-Dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate | 15.1 | |
| Aromatic hydrocarbon | |||
| 1014-60-4 | *Benzene, 1,3-bis(1,1-dimethylethyl)- | 28.3 | |
| Ethyl Butyrate (C6H12O2) | 57-55-6 | Propylene glycol | 66.7 |
| 54-11-5 | Nicotine | 56.8 | |
| 20324-32-7 | 2-Propanol, 1-(2-methoxy-1-methylethoxy)- | 38.4 | |
| 101-84-8 | Diphenyl ether | 58.1 | |
| 487-19-4 | Nicotyrine | 27 | |
| Alcohol | |||
| 108-61-2 | *1-Propanol, 2,2'-oxybis- | 21.2 | |
| 104-76-7 | *1-Hexanol, 2-ethyl- | 9.04 | |
| Ester | |||
| 105-54-4 | *Ethyl butyrate | 96.1 | |
| Aromatic hydrocarbon | |||
| *Benzenemethanol, α,α-dimethyl- | 29.6 | ||
| Aldehyde | |||
| 124-19-6 | *Nonanal (C9H18O) | 38.1 | |
| Triacetin (C9H14O6) | 4254-14-2 | Propylene glycol | 68.2 |
| 54-11-5 | Nicotine | 67 | |
| 20324-32-7 | 2-Propanol, 1-(2-methoxy-1-methylethoxy)- | 43.9 | |
| 101-84-8 | Diphenyl ether | 55.8 | |
| 487-19-4 | Nicotyrine | 23.7 | |
| Alcohol | |||
| 116-09-6 | *2-Propanone, 1-hydroxy-(C3H6O2) | 38 | |
| 54305-61-2 | *2-Butanol, 3,3'-oxybis- | 35.1 | |
| Ester | |||
| 102-62-5 | *Glycerol 1,2-diacetate | 49.3 | |
| Aromatic hydrocarbon | |||
| 1014-60-4 | *Benzene, 1,3-bis(1,1-dimethylethyl)- | 15.5 | |
| Hexyl Acetate (C8H16O2) | 57-55-6 | Propylene glycol | 34.5 |
| 54-11-5 | Nicotine | 70.2 | |
| 20324-32-7 | 2-Propanol, 1-(2-methoxy-1-methylethoxy)- | 45.4 | |
| 101-84-8 | Diphenyl ether | 64.3 | |
| 478-19-4 | Nicotyrine | 23.9 | |
| Alcohol | |||
| 111-27-3 | *1-Hexanol | 28.3 | |
| Ester | |||
| 142-92-7 | *Hexyl acetate | 90.1 | |
| 95-92-1 | *Ethanedioic acid, diethyl ester | 62.8 | |
| Aromatic hydrocarbon | |||
| 1014-60-4 | *Benzene, 1,3-bis(1,1-dimethylethyl)- | 35.2 | |
| Aldehyde | |||
| 124-19-6 | *Nonanal (C9H18O) | 54.7 | |
| Carboxylic acid | |||
| 26164-26-1 | *Benzeneacetic acid, α-methoxy-, (S)- (C6H5CH(OCH3)CO2H) | 6.13 | |
| Urea | |||
| 598-50-5 | *N-Methylurea (CH3NHCONH2) | 33.3 | |
| Ethyl Maltol (C7H8O3) | 57-55-6 | Propylene Glycol | 32.2 |
| 54-11-5 | Nicotine | 57.9 | |
| 20324-32-7 | 2-Propanol, 1-(2-methoxy-1-methylethoxy)- | 60.2 | |
| 101-84-8 | Diphenyl ether | 32.8 | |
| 478-19-4 | Nicotyrine | ||
| Alcohol | |||
| 13588-28-8 | *1-Propanol, 2-(2-methoxypropoxy)- | 66.5 | |
| 54305-61-2 | *2-Butanol, 3,3'-oxybis- | 55 | |
| 4940-11-8 | *Ethyl maltol | 66.2 | |
| Aromatic hydrocarbon | |||
| 1014-60-4 | *Benzene, 1,3-bis(1,1-dimethylethyl)- | 49.1 | |
| 108-41-8 | *Benzene, 1-chloro-3-methyl- | 35.1 | |
| 95-49-8 | *Benzene, 1-chloro-2-methyl- | 43.8 | |
| Aldehyde | |||
| 124-19-6 | *Nonanal (C9H18O) | 24.3 | |
| Carbonyl compound | |||
| 1874-54-0 | *Psicofuranine (C11H15N5O5) | 29.3 | |
| Ether | |||
| 3386-87-6 | *3,3'-(Ethylenedioxy) dipropionitrile (C8H12N2O2) | 24.5 | |
* = a unique chemical by-product that is not present in the control aerosol. These chemical by-products are based on detectable peaks and suggested by the NIST Mass Spectral Library.