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Generation of Electronic Cigarette Aerosol by a Third-Generation Machine-Vaping Device: Application to Toxicological Studies
Published on: August 25, 2018
Elevated Toxic Element Emissions from Popular Disposable E‑Cigarettes: Sources, Life Cycle, and Health Risks.
Mark R Salazar1, Lalima Saini1, Tran B Nguyen1
1Department of Environmental Toxicology, University of California Davis, Davis, California 95616, United States.
Disposable e-cigarettes emit toxic metals like lead and nickel at dangerous levels, posing significant health risks to young people. These harmful emissions far exceed those from traditional cigarettes, highlighting urgent regulatory needs.
Area of Science:
- Environmental Health
- Toxicology
- Materials Science
Background:
- Disposable e-cigarettes are increasingly popular among adolescents and young adults.
- The health risks associated with disposable e-cigarette aerosols are not well understood.
- Concerns exist regarding the potential for toxicant release from device components.
Purpose of the Study:
- To quantify toxic metallic element emissions from popular disposable e-cigarette brands.
- To identify the sources of metallic contamination in e-liquids and aerosols.
- To assess the associated health risks.
Main Methods:
- Analysis of e-liquids and aerosols from Esco Bar, Flum Pebble, and ELF Bar devices.
- Inductively coupled plasma mass spectrometry (ICP-MS) for elemental quantification.
- Risk assessment calculations for cancer and noncancer health effects.
Main Results:
- Aerosols contained metallic elements (Cr, Ni, Pb, Cu, Zn, Sb) at concentrations orders of magnitude higher than traditional cigarettes.
- Lead (Pb) contamination originated from illicit use of leaded bronze in device components.
- Nickel (Ni) and antimony (Sb) concentrations increased significantly over device lifespan.
- Risk assessments indicated exceeding safety thresholds for cancer (Ni, Sb-(III)) and noncancer (Pb, Ni) toxicity.
Conclusions:
- Disposable e-cigarettes, particularly flavored varieties, emit excessive toxic metals.
- Device component materials and degradation contribute significantly to aerosol toxicity.
- Current e-cigarette regulations are inadequate, necessitating urgent public health interventions.
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