Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 153, ST9

Mechanisms of transfer of ammonia in cigarette smoke from ammonium compounds in tobacco

Altadis Research Centre, Fleury-les-Aubrais, France
The objectives of this study were to investigate the mechanisms of transfer of ammonia in smoke from the ammonium compounds in tobacco and the consequences of this transfer for other smoke constituents (in particular nicotine). A survey of 54 commercial products in the European Union shows a slight increase of ammonia in smoke when the level of ammonium in tobacco increases. However this increase is much lower than would be expected if a quantitative transfer of ammonia in smoke from ammonium in tobacco was to take place. In order to investigate the mechanisms of transfer of ammonia in the smoke and the possible interactions between ammonia and carbohydrates derived compounds, an experimental plan has been designed. Different amounts of DAP and sucrose have been added to a standard American blend according to a matrix design. The following parameters in the smoke of cigarettes made with these blends have been determined : ammonia, carbonyl compounds, pyrazines, nicotine, nicotine in vapour phase, and the " smoke pH ". From these data, it is possible to calculate statistical models for all these variables in function of the DAP and sucrose levels in tobacco. The possible mechanisms of ammonia transfer in smoke and the effects on nicotine transfer will be discussed using these models.