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CORESTA Congress, New Orleans, 2002, T 07

Determination of cigarette filter removal efficiencies: a comparison of methods

DEUTSCH L.J.
Celanese Acetate, Charlotte, NC, USA.
The cigarette filter properties commonly known as whole smoke removal efficiency, tar removal efficiency, and nicotine removal efficiency (SRE, TRE, and NRE, respectively) are key elements in proper cigarette design. Measuring these parameters has become a relatively routine practice in cigarette testing laboratories. However, while there are established protocols for analytical smoking procedures, smoke condensate collection, and water and nicotine analysis, there are two distinct methods for the determination of smoke condensate retained by the cigarette filter. One method is to smoke the whole cigarette to the proper butt length, followed by a second analysis in which the same amount of tobacco rod (without filter) is smoked. The difference in collected smoke condensate between the two analyses is presumed to be equivalent to the smoke condensate retained by the filter during the initial smoking. The second method requires removing the filter from the tobacco rod, weighing the filter, reattaching the filter and smoking the cigarette, and finally detaching the filter from the butt and re-weighing it. In this method, the smoke condensate retained by the cigarette filter is determined directly, and only one smoking is required. The main disadvantage of this approach is that it requires considerably more labor. This paper will compare the data produced by the two procedures.