The paper by Goniewicz et. al. [3] contained the largest study of chemical emissions from ecigarettes
and forms the primary basis for our analyses. In the Goniewicz study, the chemical
emissions of volatile organic compounds, tobacco specific nitrosamines, and heavy metals were
measured in the aerosol from 12 different e-cigarettes. Each e-cigarette was tested 3 times. A
total of 150 puffs (70 ml/puff) were directly vaporized into the analytical samplers from an ecigarette
attached to a mechanical smoking machine.