Investigation of the evaporation behavior of aroma compounds in e-cigarettes.

Introduction:
This text is a summary of a research paper that investigates the evaporation behavior of certain aroma compounds found in e-cigarettes. The study aims to evaluate the amount of aroma compounds present in the vapor produced by e-cigarettes and the factors that affect their evaporation. The results of this study are important for understanding the potential health effects of e-cigarette use.

Key Points:

* The study developed a smoking machine to capture aroma compounds present in e-cigarette vapor.
* The smoking machine was used to examine the influence of e-cigarette temperature, liquid base composition, type of e-cigarette, and atomizer coil material on the evaporation of benzaldehyde, estragole, and different terpenoids.
* The study found that high temperature, type of e-cigarette, and atomizer coil material can lead to oxidation of limonene and linalool in the vapor.
* The coefficient of variation (CV) was used as an indicator of reproducibility, with most coefficients of variation lying above 20%.
* The study found that the smoking machine used in this publication achieved a CV of below 20%, indicating high reproducibility.
* The study also found that the analyzed compound affects the reproducibility, with benzaldehyde and estragole showing the lowest CVs at high temperatures and α- and β-pinene showing the highest CVs at low temperatures.
* The study did not find any temperature dependence for the aroma compounds, with benzaldehyde being found in the highest concentration and t-anethole evaporating less likely due to its higher solubility in polar solvents.

Main Message:
The main message of this summary is that the study found that the smoking machine used in this publication achieved a high level of reproducibility and that the type of e-cigarette, atomizer coil material, and high temperature can lead to oxidation of limonene and linalool in the vapor. The study also highlights the importance of understanding the evaporation behavior of aroma compounds found in e-cigarettes, as it could have potential health effects. The development of a reliable smoking machine that can capture aroma compounds present in e-cigarette vapor is a crucial step towards understanding these potential health effects.

Noel JC, Ruzsanyi V, Rainer M, Bonn G. Investigation of the evaporation behavior of aroma compounds in e-cigarettes. anal Bioanal Chem. 2019;411:3029-3035. doi:10.1007/s00216-019-01749-7