The study analyzed the levels of a large number of pollutants in the ambient air of a room in an office building during the presence of three smokers using electronic cigarettes. The room was moderately ventilated at 0.56 air changes per hour.

This seemed surprising at first as the current trend shows the high the PG level the more of the three chemicals that will be released. However a reasonable explanation would be the flavoring used in the 50/50 ratio E-Juice. E-Juice flavorings (especially the low quality type) can be alcohol based thus the increase of acetone being released. Capella and The FlavorApprenticeare two companies that avoid acetone in their flavoring solutions. Sonot all E-Juice have to have acetone.

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