Table 4.
Volatiles compounds: Per-puff concentration of e-cigarette vapour emissions, respective method air blanks and Ky1R6F cigarette smoke.
| Vapour constituent | Unit | ePod1.0 | Cigarette | Percentage reduction (%) | |||
|---|---|---|---|---|---|---|---|
| Air blank | BB57 | BB18 | Ky1R6F | BB57 | BB18 | ||
| Volatile organic compounds | |||||||
| Puff count | Per consumable | 50 | 50 | 50 | 9 | - | - |
| Acetamide | µg puff–1 | < LOD | < LOQ | < LOD | 1.46 ± 0.09 | 99.4 | 99.8 |
| Acrylamide | µg puff–1 | < LOD | < LOD | < LOD | 0.48 ± 0.03 | 98.7 | 98.7 |
| Acrylonitrile | µg puff–1 | < LOD | < LOD | < LOD | 2.24 ± 0.24 | 99.9 | 99.9 |
| Allyl alcohol | µg puff–1 | < LOD | < LOQ | < LOQ | 1.38 ± 0.18 | 99.7 | 99.8 |
| Benzene | µg puff–1 | < LOD | < LOD | < LOD | 8.46 ± 0.85 | > 99.9 | > 99.9 |
| Benzo(b)furan | µg puff–1 | < LOD | < LOD | < LOD | 0.07 ± 0.01 | 99.3 | 99.3 |
| 1,3-Butadiene | µg puff–1 | < LOD | < LOD | < LOD | 9.35 ± 0.60 | > 99.9 | > 99.9 |
| Ethylbenzene | µg puff–1 | < LOD | < LOD | < LOD | 1.40 ± 0.23 | 99.9 | 99.9 |
| Ethyl carbamate | ng puff–1 | < LOD | < LOD | < LOD | < LOD | NC | NC |
| Ethylene oxide | µg puff–1 | < LOD | < LOD | < LOD | 1.84 ± 0.13 | 99.8 | 99.8 |
| Hydrogen cyanide | µg puff–1 | < LOD | < LOQ | < LOD | 42.5 ± 1.86 | 99.9 | 99.9 |
| Hydrazine | ng puff–1 | < LOD | < LOD | < LOD | < LOD | NC | NC |
| Furan | µg puff–1 | < LOD | < LOD | < LOD | 6.09 ± 0.47 | > 99.9 | > 99.9 |
| Isoprene | µg puff–1 | < LOD | < LOD | < LOD | 90.6 ± 7.18 | > 99.9 | > 99.9 |
| Nitrobenzene | µg puff–1 | < LOD | < LOD | < LOD | < LOD | NC | NC |
| Nitromethane | ng puff–1 | < LOD | < LOD | < LOD | 46.2 ± 5.6 | 98.2 | 98.2 |
| Propylene oxide | ng puff–1 | < LOD | < LOD | < LOD | 156 ± 26.4 | 99.0 | 99.0 |
| Pyridine | µg puff–1 | < LOD | < LOD | < LOD | 2.19 ± 0.25 | 99.9 | 99.9 |
| Quinoline | µg puff–1 | < LOD | < LOD | < LOD | 0.06 ± 0.003 | 99.4 | 99.4 |
| Styrene | µg puff–1 | < LOD | < LOD | < LOD | 1.10 ± 0.08 | 99.9 | 99.9 |
| Toluene | µg puff–1 | < LOD | < LOD | < LOD | 13.3 ± 1.65 | > 99.9 | > 99.9 |
| Vinyl acetate | ng puff–1 | < LOD | < LOD | < LOD | 58.6 ± 2.39 | 98.1 | 98.1 |
| Vinyl chloride | ng puff–1 | < LOD | < LOD | < LOD | 11.2 ± 0.88 | 99.4 | 99.4 |
Values are presented as mean ± standard deviation (n = 5). Percentage reduction of e-cigarette emissions relative to Ky1R6F cigarette smoke. NC not calculated, LOD limit of detection, LOQ limit of quantification. More information about the analytical methods and respective LODs and LOQs are under the Supplementary Information (Tables S1 and S2).