Table 1.

The characteristics of the e-liquids and cigarette types used for the real-time measurements inside the closed room.

Exp. Number:	e-Liquids/Cigarette Type
1	80% PG–20% VG 18 mg/mL nicotine
2	50% PG–50% VG 12 mg/mL nicotine
3	80% PG–20% VG 12 mg/mL nicotine
4	70% PG–30% VG 12 mg/mL nicotine 1
5	20% PG–80% VG without nicotine 1
6	Hand-rolling cigarette
7	Conventional tobacco cigarette

¹ Commercially available e-cigarette liquids. PG: propylene glycol, VG: vegetable glycerin.