Relationship Between Cigarette Yields and Smoking Time Under Different Machine Smoking Regimes

Many tobacco product regulations worldwide require the reporting of ?tar”, nicotine and carbon monoxide and set limits on their yields measured following the ISO smoking regime. Within the current regulatory framework, the introduction or recommendation for an additional more intense smoking regime with filter ventilation blocked has been made. The relationship was evaluated between measured yields and the difference between smouldering and smoking times with filter ventilation open or blocked under different smoking regimes. Development and evaluation of a cigarette burning model revealed a straight line relationship passing through the origin, showing that the "tar", nicotine and CO yields from one smoking regime can be used to predict the yields at any smoking time. Consequently, the rationale for conducting laboratory work under an additional specific regime is questionable and the additional data set adds no more value beyond adding a point to a known line. [Beitr. Tabakforsch. Int. 26 (2014) 4-18]