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The e-cigarette and HnB aerosols were tested at two different puff durations, with the longer puff duration lasting up to 4 seconds. However while e-cigarettes were found to deliver more nicotine at a longer puff, no change was observed in HnB nicotine delivery at a prolonged puff.
HnB deliver more nicotine than some e-cigs
The nicotine levels produced by the HnB products were significantly higher than those produced by the first generation cig-a-like e-cigarettes at both puff durations. Tobacco sticks were found to contain a similar nicotine concentration to tobacco cigarettes, however the levels of nicotine delivered to the aerosol of the heat-not-burn products were found to be lower than those delivered by tobacco cigarettes.
Although this study offers some useful information about the relative nicotine delivery amounts of different electronic devices, it is important to note that the levels were measured using a smoking machine and followed a specific puffing regimen. Hence these figures may vary from the exposures in a non-experimental setting, and cannot be equated to the amount of nicotine that would be absorbed by individuals in real life situations. Additionally the devices tested only contained e-liquids with a nicotine concentration of 2%, since this is the highest level acceptable according to the EU Tobacco Products Directive (TPD).