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. Author manuscript; available in PMC: 2019 Sep 17.
Published in final edited form as: Chem Res Toxicol. 2018 Aug 21;31(9):861–868. doi: 10.1021/acs.chemrestox.8b00063

Figure 1.

Figure 1.

Nicotyrine concentrations after introducing 20 and 50 puffs of clean air under different conditions: (a) clean air flowing through a filter spiked with 50μL VG-based e-liquids containing 12 mg/mL nicotine, under different puff volumes and 3.8 s duration, and (b) clean air flowing through a filter spiked with 50 μL VG-based e-liquids containing various amounts of nicotine, under 90 mL puff volumes and 3.8 s duration (n = 5, and error bars are standard deviations of 5 independent measurements).