The study, entitled Metal Concentrations in Aerosol and Liquid Samples for Electronic Cigars: The Contribution of Metal Resistances , was published in Enviromental Health Perspectives . The study authors tested the liquids in the refill dispensers, the aerosol, and the remaining liquid in the 56 vaper tanks, and reported potentially unsafe levels of arsenic, chromium, manganese, nickel and lead.
The researchers concluded that these metals could be detaching themselves from the heating resistors of the electronic cigarettes, noting that the aerosol metal concentrations were higher in the devices to which the resistances were changed with greater frequency. The authors, from the Johns Hopkins School of Public Health, explained that repeated inhalation of these metals has been related to a number of cancers, as well as to brain, cardiovascular, immune, liver and lung diseases.
“It is important that the FDA, the electronic cigarette companies, and the vapers [users] themselves know that these heating resistors, as they are currently doing, appear to be releasing toxic metals - which are mixed with the aerosol that Vapers inhale, ”said lead author Ana Maria Rule of the Department of Environmental Health and Engineering at Bloomberg School.