Temperature-Yield Profiles of Tobacco and Tobacco Constituents l: Borate-Treated and Untreated Tobacco

Analyses of the smoke from cigarettes made from borate-treated tobacco have shown a significant increase in the levels of phenol, o-cresol, m-, p-cresol, and benzo[a]pyrene. To determine the temperature range at which this additive is operative temperature-yield profiles from tube pyrolyses have been obtained for both untreated and borate-treated tobacco. The profile for untreated tobacco indicates that there are two distinct modes of phenol formation. Addition of borate to the tobacco suppresses phenol formation at lower temperatures and greatly enhances its formation at higher temperatures. The modes of formation of the cresols do not appear to be markedly altered by the addition of borate to tobacco.