The products used in this study were PMI’s IQOS, both regular and menthol variants, the Nautilus Mini e-cigarette, a tank-type atomizer tested with a tobacco-flavoured liquid at 10 W and 14 W and a Marlboro Red cigarette. Aerosol and smoke were collected in impingers containing 2,4-dinitrophenylhydrazine and Health Canada Intense and two more intense puffing regimes were used to measure levels of carbonyl.
With regards to e-cigarettes, no levels of propionaldehyde and crotonaldehyde, and very low levels of the other carbonyls were detected. When using 5g of e-cigarette liquid, in comparison to 20 cigarettes a 92.2 to 99.8% reduced level of carbonyls is noted. Whilst when comparing 20 heets sticks with the same amount of cigarettes an 81.7 to 97.9% level of reduced emissions were measured.
HnB have lower emissions than cigarettes but higher than e-cigs
The researchers concluded that the IQOS HnB device emits substantially lower levels of carbonyls than a regular cigarette (Marlboro Red) but higher levels than a Nautilus Mini e-cigarette.
In 2017, lead researcher Dr. Farsalinos, replicated two renowned studies which made alarming claims about aldehyde emissions from e-cigarettes, and found inaccuracies in the way the levels were measured. Farsalinos had pointed out that unfortunately “the field of e-cigarette research has an unusually high number of studies reporting “strange” (to say the least) results.”
Read Further: NCBI