Table 2. Carbonyl Compounds Formed from e-Cigarettes and e-Liquids^a.

product code	acetaldehyde μg/10 puffs	acrolein μg/10 puffs	formaldehyde μg/10 puffs	acetone μg/10 puffs
EC01	0.57 ± 0.03	0.05 ± 0.01	0.55 ± 0.03	4.97 ± 0.31
EC02	0.49 ± 0.03	0.24 ± 0.01	0.62 ± 0.05	5.90 ± 0.36
EC03	0.52 ± 0.04	0.07 ± 0.01	0.43 ± 0.05	6.21 ± 0.34
EC04	0.15 ± 0.02	0.02 ± 0.002	0.18 ± 0.02	1.29 ± 0.16
EL01	63.1 ± 3.5	1.6 ± 0.2	26.8 ± 2.6	9.3 ± 0.7
EL02	23.3 ± 2.4	1.9 ± 0.5	8.2 ± 0.2	4.2 ± 0.9
EL03	44.8 ± 3.3	2.0 ± 0.04	40.4 ± 0.4	12.5 ± 0.3
EL04	13.3 ± 0.02	5.8 ± 0.8	15.2 ± 0.02	1.3 ± 0.2
EL05	13.9 ± 5.3	2.1 ± 0.5	20.1 ± 3.7	2.9 ± 0.2
EL06	15.2 ± 4.8	3.1 ± 0.4	21.8 ± 5.1	3.0 ± 0.5
tobacco cigaretteb	1240.3 ± 17.7	120.4 ± 14.7	74.0 ± 23.7	641.9 ± 71.2

^aAerosol samples were generated at a battery power output of 4.6 W for the blu e-cigarettes EC01–EC04 and a battery power output of 9.1 W for e-liquids EL01–EL06 using an EVOD2 atomizer (puff volume of 91 mL and puff duration of 4 s). Each experiment was performed in triplicate, and the data are expressed as the average (±SD) of the measured values.

^bData from Counts et al. (Health Canada Intense puffing regime).³⁴