CORESTA Congress, Kunming, 2018, Smoke Science/Product Technology Groups, STPOST 08

Effects of treatment time of ultraviolet irradiation and ozone on the internal quality of the redrying tobacco

XU Chunping(1); BAI Jiafeng(2); ZHENG Kai(3); ZHU Guocheng(3); HU Zhizhong(2); JIANG Yu(1); XU Heng(4); LI Shufang(3); YANG Zhiqiang(3)
(1) College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, P.R. China; (2) Technical Center, China Tobacco Guangxi Industrial Co. Ltd, Nanning, Guanxi, P.R. China; (3) Xuchang Cigarette Factory, China Tobacco Henan Industrial Co., Ltd., Xuchang, Henan, P.R. China; (4) Technical Center, China Tobacco Henan Industrial Co., Ltd, Zhengzhou, Henan, P.R. China

To investigate the effect of ultraviolet (UV) radiation and ozone on the internal quality of redrying tobacco, Qujing redrying tobacco (B2F) was selected as experimental material and irradiated by UV irradiation (producing ozone) and treated with ozone for different periods. The conventional chemical composition and aroma composition were then analyzed, and sensory evaluation was examined.

The results showed that the contents of total sugar and water-soluble sugar were raised by ozone treatment. The total sugar content was the highest after 0.5 h treatment, while water-soluble sugar content was the highest after 1.5 h treatment. The nicotine in the treated sample was significantly lower than that in the control, and nicotine content was the lowest after 2.0 h treatment. The ratio of sugar to nicotine was highest after 0.5 h treatment. The total aroma amount was the highest during the processing time of 1.0 h. The sensory evaluation showed that quality and quantity of aroma were best after 0.5 h treatment, and the aftertaste was weaker and strength was moderate.

By UV irradiation (producing ozone) treatment, the contents of total sugar and water-soluble sugar were higher than the control and the highest after 0.5 h treatment, except 2.0 h treatment time. After 0.5 h treatment, the nicotine in the treated sample was the lowest and the ratio of sugar to nicotine was the highest. The total aroma amount was the highest in the processing time of 1.0 h.

In summary, the quality of tobacco leaf was the best with the 0.5 h ozone treatment and the 1.0 h UV irradiation (producing ozone) treatment, with the latter being better than the former.