CORESTA Congress, Quebec, 2014, Smoke Science/Product Technology Groups, ST 86

Smoke analysis of fine-cut tobacco – a predicting model and other challenges

(1) Imperial Tobacco Group, SEITA, Fleury-les-Aubrais, France; (2) Imperial Tobacco Ltd, Bristol, U.K.

The ISO 15592-1 to 3 standards specify methods for the sampling, conditioning and determination of nicotine and “tar” in the mainstream smoke generated by the combustion of fine-cut tobacco. As originally requested by several European government chemists, four articles were smoked using two weights of tobacco corresponding to two diameters, and two types of wrappers with different burning properties. This leads to a matrix of four data points providing an indication of the influence of wrapper and tobacco weight on tar and nicotine yields.

Laboratories can face difficulties to perform the measurement on some matrix points especially for small diameters and for testing of high expanded blends. Herein, we present a study to investigate the effects of the paper and the diameter on the tar and nicotine yields. We also evaluate whether the multiple data points in the matrix can be determined from a single set of experimental values.

A model was developed based on the article characteristics and the yields published in the ISO standard in order to estimate any of the matrix points from one reference matrix point. These parameters are diameter, type of paper, and the interaction diameter/paper. This was subsequently validated using datasets of 53 samples corresponding to 212 yields taking into account the variability of the analytical measurement.

Using this modelling approach, the results of the three calculated matrix points from one reference matrix point are in line with the corresponding experimental results from the laboratory. Nevertheless, experimental challenges remain and need to be investigated.