ISO emissions | Canadian Intense emissions | ||||||||
Tobacco constituents | Correlation | Mean transfer %† (SD) | Correlation | Mean transfer % (SD) | |||||
Alkaloids | |||||||||
Nicotine (μg/g) | 0.28*** | 3.6 (1.6) | 0.44*** | 7.9 (2.9) | |||||
Metals | |||||||||
Lead (ng/g) | 0.63*** | 4.9 (2.1) | 0.73*** | 11.8 (3.9) | |||||
Cadmium (ng/g) | 0.36** | 6.8 (2.7) | 0.59*** | 19.5 (5.4) | |||||
Mercury (ng/g) | 0.02 | 11.7 (2.7) | 0.56*** | 25.8 (4.3) | |||||
Nitrosamines | |||||||||
NNN (ng/g) | 0.94*** | 7.4 (2.7) | 0.96*** | 15.6 (4.7) | |||||
NNK (ng/g) | 0.62*** | 9.8 (3.7) | 0.54*** | 20.9 (7.9) | |||||
NAT (ng/g) | 0.52*** | 8.0 (3.8) | 0.49*** | 16.8 (7.6) | |||||
Other | |||||||||
Ammonia (μg/g) | 0.30** | 3.6 (1.6) | 0.87*** | 7.9 (2.9) | |||||
Benzo[a]pyrene (ng/g) | 0.84*** | – | 0.89*** | – | |||||
Nitrate (mg/g) vs nitric oxide (μg) | 0.87*** | – | 0.93*** | – | |||||
Nitrate (mg/g) vs NOx (μg) | 0.88*** | – | 0.94*** | – |
NNN, N-nitrosonornicotine; NNK, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone; NAT, N-nitrosoanatabine.
*p<0.05, **p<0.01, ***p<0.001.
†Transfer % = constituent levels/smoke emission level.
NAB excluded owing to insufficient data (n = 5).
Brands with levels below detectable limits were excluded from each analysis.