A rational definition for characterizing the capacity of a cigarette filter to selectively modify the chemical composition of mainstream smoke is presented. The definition is related to the concept of separation factor as defined in chemical engineering and applied in the description of various unit processes. A number of numerical values for a wide range of cigarette filters currently found in the world market place are presented. The relative independence of the selectivity as defined in this paper upon tobacco types is demonstrated. Using a fixed filter construction in terms of amount and type of cellulose acetate fiber and plasticizer content, selectivity values are presented as a function of cigarette length and relative proportion of the cigarette which is allotted to the filter. Further, it is shown that selectivity appears to increase with length for given filter construction parameters. A limited amount of data regarding selectivity for weak acid components of mainstream smoke and certain gas phase components is presented as a characterization of dual filters currently on the US market
If the inline PDF is not rendering correctly, you can download the PDF file here.
1. Haag H. B. Larson P. S. and Finnegan J. K.: A. M. A. Archives of Otolaryngology 69 (1959) .261 . .
2. Hoffmann D. and Wynder E. L.: Journal of the National Cancer Institute 30 (1963) 67; Beiträge zur Tabakforschung .2 (1963) 51.
3. Davis H. J. and George T. W.: On the Potential for the Selective Filtration of Cigarette Smoke by Cellulose Acetate Fiber (paper presented at the Sixteenth Tobacco Chemists' Research Conference Richmond Virginia 196.2).
4. Spears A. W.: Tobacco Science 7 (1963) 76.
5. Norman V. Newsome J R. and Keith C. H.: Techniques for the Analysis of Tobacco Smoke Vapors (paper presented at the Seventeenth Tobacco Chemists' Research Conference Montreal Canada 1963).
6. Williamson J. T. and Allman D. R.: Vapor Phase Analysis of Consecutive Puffs during the Smoking of a Cigarette (paper presented at the Seventeenth Tobacco Chemists' Research Conference Montreal Canada 1963).
7. Boutwell R. K. and Bosch D. K.: Cancer Research 19 (1959) 413.
8. Wynder E. L. and Hoffmann D.: Cancer 14 (1961) 1306.
9. Irby R. M. Jr. and Harlow E. S.: Tobacco Science 3 (1959) 52. :
10. Guillerm R. G. Bardre R. and Vignon B.: Bulletin Academie Nationale de Medecine 145 (1961) 416.
11. Kensler C. J. and Battista S. P.: New England Journal of Medicine .269 (1963) i161.
12. Wynder E. L. Kaiser H. E. Goodman D. A. and Hoffmann D.: Cancer 16 (1963) 12.2.2.
13. Wynder E. L. and Hoffmann D.: Advances in Cancer Research New York Academic Press 1964.
14. Coulson J. M. and Richardson J. F.: Cheinical Engineering Volume II Unit Operations New York McGraw-Hill 1955 p. 751.
15. Hoffmann D. and Wynder E. L.: Beiträge zur Tabakforschung 1 (1961) 101.
16. Ehmke H. and Neurath G.: Beiträge zur Tabakforschung .2 (1964) .205