Table 3. Estimated carbonyls generated from 10 puffs (50 ml/puff, 3-s puff duration) of commercial e-liquid #2 at different temperatures.

Temperature	Formaldehyde, μg	Acetaldehyde, μg	Acrolein, μg
318°C	225–250	59–66	11–12
270°C	31–35	9–11	~1
215°C	6.0–6.7	2.1–2.4	ND
161°C	~1.4	ND	ND
108°C	~ 0.1	~1.2	ND
50°C	~ 0.4	ND	ND

ND: not detected.