The interest in e-cigarette research has resulted in the development of methods for quantitative analysis of chemical constituents present in their aerosols. The emissions of e-cigarettes contain not only nicotine, propylene glycol, glycerin, water and flavours, but also nicotine related impurities and thermal degradation products. We have developed and validated analytical methods for the analysis of e-cigarette aerosols including the compounds listed in the US FDA Draft PMTA guidance document. These include primary constitutes, aldehydes, VOCs, organic acids, metals, aromatic amines, nicotine related impurities and benzo[a]pyrene. An emerging tobacco product; Heated Tobacco Products (HTPs) produce an aerosol by heating of tobacco. Since tobacco is not combusted in these products, the majority of the resulting aerosol is comprised of water, humectants and volatile compounds. Given the similarities between e-cigarettes and HTPs, we hypothesized that e-cigarettes methods would also be suitable for analysis of HTPs emissions. In this study, we have applied our e-cigarette methods to the analysis of the iQOS HEETS HTPs. The aerosols were collected under intense smoking condition, using a device holder designed for e-cigarettes, and analyzed for HPHCs. Additionally, the aerosols were analyzed for water using both the ISO method for cigarettes and an in-house developed method. We found that methods developed and validated for e-cigarettes could be successfully used for the analysis of HTPs. With the exception of nicotine and water, the emissions from HTPs were found to be more similar in emissions to e-cigarettes aerosol than cigarettes smoke. We found that e-cigarette methods are well suited for the analysis of HTPs due to the lower calibration ranges and selected compound list as compared to methods developed for conventional cigarettes. Data will be reported for all the FDA PMTA compounds in the HTPs, including comparisons of expected ranges in both e-cigarettes and cigarette smoke.

Authors and Affiliations:
Enthalpy Analytical LLC, Durham, NC, USA

TSRC, Tob. Sci. Res. Conf., 2018, 72, abstr. 025 (also presented at CORESTA 2018)