Benzene formation in electronic cigarettes
BACKGROUND/OBJECTIVE: The heating of the fluids used in electronic cigarettes (“e-cigarettes”) used to create “vaping” aerosols is capable of causing a wide range of degradation reaction products. We investigated formation of benzene (an important human carcinogen) from e-cigarette fluids containing...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5342216/ https://www.ncbi.nlm.nih.gov/pubmed/28273096 http://dx.doi.org/10.1371/journal.pone.0173055 |
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author | Pankow, James F. Kim, Kilsun McWhirter, Kevin J. Luo, Wentai Escobedo, Jorge O. Strongin, Robert M. Duell, Anna K. Peyton, David H. |
author_facet | Pankow, James F. Kim, Kilsun McWhirter, Kevin J. Luo, Wentai Escobedo, Jorge O. Strongin, Robert M. Duell, Anna K. Peyton, David H. |
author_sort | Pankow, James F. |
collection | PubMed |
description | BACKGROUND/OBJECTIVE: The heating of the fluids used in electronic cigarettes (“e-cigarettes”) used to create “vaping” aerosols is capable of causing a wide range of degradation reaction products. We investigated formation of benzene (an important human carcinogen) from e-cigarette fluids containing propylene glycol (PG), glycerol (GL), benzoic acid, the flavor chemical benzaldehyde, and nicotine. METHODS/MAIN RESULTS: Three e-cigarette devices were used: the JUUL(TM) “pod” system (provides no user accessible settings other than flavor cartridge choice), and two refill tank systems that allowed a range of user accessible power settings. Benzene in the e-cigarette aerosols was determined by gas chromatography/mass spectrometry. Benzene formation was ND (not detected) in the JUUL system. In the two tank systems benzene was found to form from propylene glycol (PG) and glycerol (GL), and from the additives benzoic acid and benzaldehyde, especially at high power settings. With 50:50 PG+GL, for tank device 1 at 6W and 13W, the formed benzene concentrations were 1.9 and 750 μg/m(3). For tank device 2, at 6W and 25W, the formed concentrations were ND and 1.8 μg/m(3). With benzoic acid and benzaldehyde at ~10 mg/mL, for tank device 1, values at 13W were as high as 5000 μg/m(3). For tank device 2 at 25W, all values were ≤~100 μg/m(3). These values may be compared with what can be expected in a conventional (tobacco) cigarette, namely 200,000 μg/m(3). Thus, the risks from benzene will be lower from e-cigarettes than from conventional cigarettes. However, ambient benzene air concentrations in the U.S. have typically been 1 μg/m(3), so that benzene has been named the largest single known cancer-risk air toxic in the U.S. For non-smokers, chronically repeated exposure to benzene from e-cigarettes at levels such as 100 or higher μg/m(3) will not be of negligible risk. |
format | Online Article Text |
id | pubmed-5342216 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-53422162017-03-29 Benzene formation in electronic cigarettes Pankow, James F. Kim, Kilsun McWhirter, Kevin J. Luo, Wentai Escobedo, Jorge O. Strongin, Robert M. Duell, Anna K. Peyton, David H. PLoS One Research Article BACKGROUND/OBJECTIVE: The heating of the fluids used in electronic cigarettes (“e-cigarettes”) used to create “vaping” aerosols is capable of causing a wide range of degradation reaction products. We investigated formation of benzene (an important human carcinogen) from e-cigarette fluids containing propylene glycol (PG), glycerol (GL), benzoic acid, the flavor chemical benzaldehyde, and nicotine. METHODS/MAIN RESULTS: Three e-cigarette devices were used: the JUUL(TM) “pod” system (provides no user accessible settings other than flavor cartridge choice), and two refill tank systems that allowed a range of user accessible power settings. Benzene in the e-cigarette aerosols was determined by gas chromatography/mass spectrometry. Benzene formation was ND (not detected) in the JUUL system. In the two tank systems benzene was found to form from propylene glycol (PG) and glycerol (GL), and from the additives benzoic acid and benzaldehyde, especially at high power settings. With 50:50 PG+GL, for tank device 1 at 6W and 13W, the formed benzene concentrations were 1.9 and 750 μg/m(3). For tank device 2, at 6W and 25W, the formed concentrations were ND and 1.8 μg/m(3). With benzoic acid and benzaldehyde at ~10 mg/mL, for tank device 1, values at 13W were as high as 5000 μg/m(3). For tank device 2 at 25W, all values were ≤~100 μg/m(3). These values may be compared with what can be expected in a conventional (tobacco) cigarette, namely 200,000 μg/m(3). Thus, the risks from benzene will be lower from e-cigarettes than from conventional cigarettes. However, ambient benzene air concentrations in the U.S. have typically been 1 μg/m(3), so that benzene has been named the largest single known cancer-risk air toxic in the U.S. For non-smokers, chronically repeated exposure to benzene from e-cigarettes at levels such as 100 or higher μg/m(3) will not be of negligible risk. Public Library of Science 2017-03-08 /pmc/articles/PMC5342216/ /pubmed/28273096 http://dx.doi.org/10.1371/journal.pone.0173055 Text en © 2017 Pankow et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Pankow, James F. Kim, Kilsun McWhirter, Kevin J. Luo, Wentai Escobedo, Jorge O. Strongin, Robert M. Duell, Anna K. Peyton, David H. Benzene formation in electronic cigarettes |
title | Benzene formation in electronic cigarettes |
title_full | Benzene formation in electronic cigarettes |
title_fullStr | Benzene formation in electronic cigarettes |
title_full_unstemmed | Benzene formation in electronic cigarettes |
title_short | Benzene formation in electronic cigarettes |
title_sort | benzene formation in electronic cigarettes |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5342216/ https://www.ncbi.nlm.nih.gov/pubmed/28273096 http://dx.doi.org/10.1371/journal.pone.0173055 |
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