Summary
Introduction:
This text discusses a research study on the transfer of metals in the liquids of electronic cigarettes. The study investigates the impact of three parameters - e-liquid composition, nicotine content, and air flow - on the transfer of metals from the heating coils to the e-liquids.
Key Points:
* The study found five metals - Fe, Ni, Cu, Zn, and Pb - in the e-liquids.
* The transfer of metals increases with air flow and nicotine concentration.
* E-liquid composition also has a significant impact, with glycerol enhancing the transfer of metals compared to propylene glycol and their mixtures.
* The boiling temperature of the e-liquids significantly increases the transfer of metals in the e-liquids.
* The concentration of metals in the e-liquids strongly depends on the nature of the e-liquid, the air flow, and the nicotine content.
* The transfer of metals from the heating coil to the e-liquids increases with air flow and nicotine content due to enhanced oxidation of e-liquids to carbonyls and then to organic acids, which react with metals.
* Pure glycerol sustains the highest transfer of metals to the e-liquids, followed by the mixture of PG/G and PG/G/water, while PG sustains the lowest one.
Main Message:
The study highlights the importance of understanding the factors that contribute to the transfer of metals in the liquids of electronic cigarettes. The findings suggest that the type of e-liquid, air flow, and nicotine content can significantly impact the transfer of metals. Therefore, it is crucial to consider these factors when regulating the use and manufacturing of electronic cigarettes to ensure the safety of consumers.
Citation
Zervas E, Matsouki N, Kyriakopoulos G, Poulopoulos S, Ioannides T, Katsaounou P. Transfer of metals in the liquids of electronic cigarettes. Inhalation toxicology. 2020;32(6):240-248. doi:10.1080/08958378.2020.1776801
