Abstract
Abstract Ten laboratories participated in a 2-phase collaborative study of a method for tar and nicotine in cigarette smoke. In one phase, 200 monitor cigarettes were smoked, while in the second phase, 60 cigarettes from each of 5 pairs of samples were smoked over a period of 2 weeks according to a random port × sample design. A total of over 9000 measurements was reported for weight, number of puffs, total particulate matter, water, nicotine, and tar. Statistical analysis of the results showed the significant variables to be within- and amonglaboratory differences and a laboratory × material interaction. Agreement between laboratories was good for cigarettes delivering less than 20 mg tar and 1 mg nicotine, but poor for samples with higher tar and nicotine deliveries. Further study of the method is recommended to improve its performance with cigarettes having high tar and nicotine deliveries.
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