STUDIES OF ENVIRONMENTAL TOBACCO-SMOKE GENERATED BY DIFFERENT CIGARETTES

A method was developed to reproducibly measure environmental tobacco s moke (ETS) components generated by different cigarettes. Measurements were carried out in an unventilated, controlled environment chamber. T rue ETS (the aged and diluted combination of exhaled mainstream plus s idestream smoke) was generated by human smokers. To reliably quantitat e components normally present at trace levels, the comparisons were ca rried out at elevated ETS concentrations-greater than 40 times those t ypically encountered in ''real-world'' settings. The method was applie d to four commercially available cigarettes and a cigarette prototype that primarily heats tobacco. Forty-three properties and components of the gas and particulate phases of ETS generated by the different ciga rettes were measured. Good precision of measurement was obtained both within and between tests. Statistically significant differences in the concentration of ETS components were observed among the different com mercial cigarettes and between the commercial and prototype cigarettes . Most ETS components from the prototype cigarette were reduced by >90 % when compared to the commercial cigarettes. The method was used to d etermine the effect of cigarette design changes on the generation of E TS.