Elements including metals in the atomizer and aerosol of disposable electronic cigarettes and electronic hookahs

Introduction:
This article examines the chemical elements present in the aerosols of disposable electronic cigarettes (ECs) and electronic hookahs (Ehs), and compares them to conventional cigarette smoke. The study also explores the effect of puffing topography on the elemental content of EC/Eh aerosols and identifies the sources of these elements. The article provides valuable information for regulators and policymakers regarding the potential health risks associated with the use of ECs and Ehs.

Key Points:

* The study analyzed 36 inorganic chemical elements in EC/Eh aerosols and conventional tobacco smoke using inductively coupled plasma optical emission spectroscopy.
* Of the 36 elements screened, 35 were detected in EC/Eh aerosols, while only 15 were detected in conventional tobacco smoke.
* aerosols generated at low and high air-flow rates produced the same pattern of elements, although the total element concentration decreased at the higher airflow rate.
* Silicon was the dominant element in aerosols from all EC/Eh brands and conventional cigarette smoke.
* The elements appeared to come from the filament (nickel, chromium), thick wire (copper coated with silver), brass clamp (copper, zinc), solder joints (tin, lead), and wick and sheath (silicon, oxygen, calcium, magnesium, aluminum).
* Lead was identified in the solder and aerosol of two brands of Ehs (up to 0.165μg/10 puffs).
* The health effects of inhaling mixtures of heated metals are currently not known, but this information will be useful in future risk assessments involving EC/Eh elements/metals.

Main Message:
This study demonstrates that EC/Eh aerosols contain a mixture of elements, including heavy metals, with concentrations often significantly higher than in conventional cigarette smoke. While the health effects of inhaling these heated metals are not yet known, this information will be valuable in future risk assessments. The study highlights the importance of continued research and regulation of ECs and Ehs to ensure the safety of their users.

Williams, Monique, Krassimir Bozhilov, Sanjay Ghai, and Prue Talbot. “Elements Including Metals in the atomizer and aerosol of Disposable Electronic Cigarettes and Electronic hookahs.” Edited by Wei-Chun Chin. PLOS ONE 12, no. 4 (april 17, 2017): e0175430. https://doi.org/10.1371/journal.pone.0175430.