Free nicotine and “smoke pH”: evaluating industry methods used to determine the form of nicotine delivered in smoke
by Ferris Wayne G, Connolly G, Heningfield J, Pankow JLooks at internal industry measures of “smoke pH” and their relation to industry measures of free nicotine in cigarette smoke. Presents findings suggesting significant differences in levels of free nicotine across brands, and proposes that the public health community would benefit from research to assess directly the amount of free nicotine available in cigarette smoke.