Evaluation of tobacco stem granules in cigarette products to reduce harmful components of mainstream smoke
The development of production technology for biomass stem granules has provided a viable new application for the utilisation of waste tobacco stems. In this paper, the effects of stem granules blending proportions in cigarette products on conventional chemical compositions, deliveries of harmful components, heavy metals of cigarette mainstream smoke and cigarette sensory quality were studied. The results showed that adding stem granules can significantly reduce the deliveries of tar, nicotine, total particulate matter (TPM), CO, HCN, NNK, NH3, B[a]P, phenol, crotonaldehyde, Cr, Ni, Cd, Pb etc. in cigarette smoke. By increasing the proportion of added stem granules, hazard index (H) has been significantly reduced. Meanwhile, there is a good negative correlation between the deliveries of harmful components in mainstream smoke, evaluated hazard index (H) and the proportion of added stem granules in cigarette products. Within the ranges studied, stem granules in cigarette products have no obvious effect on sensory quality. When the proportion of added stem granules was 8%, the deliveries of tar, nicotine, Cr, Ni, Cd, Pb and Hg in cigarette mainstream smoke were decreased by 32.37%, 32.37%, 27.81%, 17.39%, 52.55%, 27.81% and 14.41%, respectively, and the hazard index (H) was decreased by 40.48% compared to the control check, which indicated that stem granules added into cigarette products could effectively reduce health risks of smoking.