Exposure of heat-not-burn tobacco effect on the quality of air and expiratory plume

Abstract

The increasing interest to avoid the consumption of regular tobacco has lead in the development of several types of devices to decrease the effects of this practice on active and bystanders. In this work, the impact of the use of new heat-not-burn (HnB) devices has been evaluated and compared with that of regular cigarettes and electronic cigarettes (e-cigs). Portable monitoring devices were employed for CO, CO2, particulate matter (PM) and volatile organic compounds (VOCs) to evaluate the quality of indoor air and expiratory plume of both, active and passive, users during these practices. It can be noticed that the levels of VOCs in active HnB smokers expiratory air are five times lower in particular cases than those provided by regular tobacco and three times lower than those obtained for e-cigs, while the contribution of particulate matter to air pollution decreases between 200 and 600 times regarding the values obtained for e-cig vaping and regular tobacco smoking. The level of contaminants as CO decreases significantly in both, active and passive HnB smokers, in comparison with active and passive regular tobacco smokers, due to the absence of organic material combustion.Regarding passive HnB smokers, the exposure to HnB smoke do not increases the level of VOCs in ambient air nor in expiratory plume, remaining at the basal levels, being three times lower than values obtained to an exposure to regular tobacco smoke and two times lower than exposure to e-cigs vapours. On the other hand, the use of HnB devices decreases the concentration of PM in bystanders around thirty five times in relation with values obtained for passive regular tobacco smokers. Concerning the nicotine content delivered by HnB tobacco, data shown that HnB tobacco provides values from 0.5 to 1.7 mg of nicotine to the mainstream, being these values similar to those found in conventional tobacco.