<abstract xmlns="http://www.w3.org/1999/xhtml">
				
				<p>Using selected additives, the pH of smoke from U.S. commercial cigarettes (5.6) can be altered over a wide range (4.1-8.2). The volatility of the additive is of greater importance in changing smoke pH than the acidic or basic strength of the additive. The activated carbon in multiple carbon-cellulose acetate filters is highly effective in removing pyridine selectively from the smoke of blended commercial cigarettes. The degree of this selectivity is markedly reduced on lowering the smoke pH to 4.1 by adding formic acid to cigarettes. On raising the pH of smoke to 8.2 by adding dipropylamine to cigarettes, the selectivity for pyridine is less than in smoke of unaltered pH and more than in smoke of pH 4.1. Some selectivity of nicotine removal is observed in the alkaline smoke using cellulose acetate filters with or without carbon. The use of formic acid to depress pH appears to alter the kinetics of nicotine pyrolysis, resulting in a changed nicotine : pyridine ratio. </p>
			</abstract>

Using selected additives, the pH of smoke from U.S. commercial cigarettes (5.6) can be altered over a wide range (4.1-8.2). The volatility of the additive is of greater importance in changing smoke pH than the acidic or basic strength of the additive. The activated carbon in multiple carbon-cellulose acetate filters is highly effective in removing pyridine selectively from the smoke of blended commercial cigarettes. The degree of this selectivity is markedly reduced on lowering the smoke pH to 4.1 by adding formic acid to cigarettes. On raising the pH of smoke to 8.2 by adding dipropylamine to cigarettes, the selectivity for pyridine is less than in smoke of unaltered pH and more than in smoke of pH 4.1. Some selectivity of nicotine removal is observed in the alkaline smoke using cellulose acetate filters with or without carbon. The use of formic acid to depress pH appears to alter the kinetics of nicotine pyrolysis, resulting in a changed nicotine : pyridine ratio.

Composition Studies on Tobacco XXXIII Changes in Smoke Composition and Filtration by Artificial Alteration of Smoke pH: Pyridine and Nicotine

Eastern Utilization Research and Development Division, Agricultural Research Service, United States Department of Agriculture, Philadelphia, Pa. USA

Contributions to Tobacco & Nicotine Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Using selected additives, the pH of smoke from U.S. commercial cigarettes (5.6) can be altered over a wide range (4.1-8.2). The volatility of the additive is...

Composition Studies on Tobacco XXXIII Changes in Smoke Composition and Filtration by Artificial Alteration of Smoke pH: Pyridine and Nicotine

Pubblicato online: 12 lug 2014

Pagine: 13 - 17

Ricevuto: 04 nov 1968

DOI: https://doi.org/10.2478/cttr-2013-0207

© Beiträge zur Tabakforschung International

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.