Comparison of the effects of e-cigarette vapor and cigarette smoke on indoor air quality

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Inhalation Toxicology (Impact Factor: 2.26). 10/2012; 24(12):850-7. DOI: 10.3109/08958378.2012.724728
Source: PubMed


Context: Electronic cigarettes (e-cigarettes) have earned considerable attention recently as an alternative to smoking tobacco, but uncertainties about their impact on health and indoor air quality have resulted in proposals for bans on indoor e-cigarette use. Objective: To assess potential health impacts relating to the use of e-cigarettes, a series of studies were conducted using e-cigarettes and standard tobacco cigarettes. Methods and materials: Four different high nicotine e-liquids were vaporized in two sets of experiments by generic 2-piece e-cigarettes to collect emissions and assess indoor air concentrations of common tobacco smoke by products. Tobacco cigarette smoke tests were conducted for comparison. Results: Comparisons of pollutant concentrations were made between e-cigarette vapor and tobacco smoke samples. Pollutants included VOCs, carbonyls, PAHs, nicotine, TSNAs, and glycols. From these results, risk analyses were conducted based on dilution into a 40 m(3) room and standard toxicological data. Non-cancer risk analysis revealed "No Significant Risk" of harm to human health for vapor samples from e-liquids (A-D). In contrast, for tobacco smoke most findings markedly exceeded risk limits indicating a condition of "Significant Risk" of harm to human health. With regard to cancer risk analysis, no vapor sample from e-liquids A-D exceeded the risk limit for either children or adults. The tobacco smoke sample approached the risk limits for adult exposure. Conclusions: For all byproducts measured, electronic cigarettes produce very small exposures relative to tobacco cigarettes. The study indicates no apparent risk to human health from e-cigarette emissions based on the compounds analyzed.

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    • "tion of PAH was dominated by the more volatile substances naphthalene , acenaphthene , fluorene and phenanthrene . With re - gard to the seven PAH classified as probable carcinogens by the IARC ( IARC , 2002 , 2010 ) , the concentration increased on average by 20% from 122 . 8 ng / m 3 ( control ) to 147 . 3 ± 26 . 2 ng / m 3 ( vaping sessions ) . McAuley et al . ( 2012 ) vaporized different high nicotine liquids by generic e - cigarettes and assessed the indoor air con - centrations of tobacco smoke specific pollutants including PAH . Most PAH were found below the limit of detection ( LOD ) . However , an anomaly was seen with B [ a ] P as it was found at similar levels in e - cigarette vapor , tobacc"
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