CORESTA Meeting, Smoke/Technology, Budapest, 1993, ST 16

Puff by puff, intrapuff, and interpuff delivery of selected inorganics to smoke from 2R1 cigarettes

Philip Morris USA, Richmond, VA, USA
In previous publications, the transfer of inorganic elements (Na, K, Cl and Br) to whole smoke has been reported (Jenkins, et al., Trans. Am. Nuclear Soc. 18, 1971; J. Aerosol Sci. 13, 1982; Beit. zur Tabak, Int. 13, 1985; and Tob. Sci. 34, 1990). In this series of papers, it was shown that one of the major transfer pathways of cigarette inorganics to smoke was the mechanical entrainment of submicron ash particles into the smoke stream. In this report, a novel method of collecting each individual puff of the mainstream smoke is described. The technique incorporated the use of a puff spreading device to collect the mainstream smoke from irradiated 2R1 cigarettes (U.S. Patent No. 4,204,550). Results show the puff-by-puff transfer of Na, K, Cl and Br. Intrapuff data are compared to that obtained from the use of cigarettes labeled with carbon-14. The puff spreading device was also used to collect the sidestream smoke produced between the puffs (interpuff) from 2R1 cigarettes. The data show the importance of the lighting puff to the total delivery of these selected elements to the sidestream smoke. The results obtained in this series of experiments corroborate our earlier hypothesis that mechanical entrainment is an important inorganic element transfer mechanism to smoke.