Table 2.

Metrics of ENDS Aerosol Deposition within Human Lungs.

Puff Fraction	Average Total Deposited Mass (µg)	Average Deposited Surface Area (cm2)	Average Deposited Dose (µg/cm2)	In Vitro Concentration (µg/mL)
Pod-type Tobacco e-liquid with 5% nicotine
1–50	2.66 × 10−7	2.23 × 10−8	1.19 × 101	39.3
101–150	1.52 × 10−5	1.01 × 10−6	1.50 × 101	49.6