A method is presented for the simultaneous determination of the redox potential and the pH of the tobacco smoke during smoking. With both values available, this method allows for the continuous determination of the redox potential during smoking, corrected for alterations in the pH of the solution. Since tobacco smoke shows a time dependent alteration in the reducing ability within the first few puffs, this method is more relevant to the actual physiological conditions than previous methods. The determination of the pH reflects the contribution of both phases of the smoke. This method allows the monitoring of two parameters which have major effects upon smoke composition, quality, and physiological systems.

(Full article published with kind permission from "Tobacco International")