Effects Of Expanding Temperature On Aroma Substances And Sensory Quality Of The Expanded Tobacco By Carbon Dioxide

In this paper, the important changes in volatile flavor components and the sensory quality of cut tobacco expanded by CO2 under the four different temperature conditions (200℃, 250℃, 300℃, 350℃) were analyzed and compared. Results suggest that: the expanding condition should be changed according to the tobacco class., the upper high class leaves are expanded by lower temperature, the middle class leaves are expanded by medium temperature, while the low class leaves are expanded by higher temperature. The main results and conclusions are as follows.1. Combined with the use of distillation and extraction and capillary collection, reuse of GC method and GC / MS method, the neutral, alkaline and acidic flavor components were separated, then qualitatively and quantitatively measured. The 19 neutral flavor components, 13 basic flavor components and 21 acidic flavor components were determined, respectively. The experimental results showed that the most of aroma substances of expanded tobacco by CO2 were decreased to some extent. The total of neutral aroma substance (except neophytadiene), alkaline aroma substance and acidic aroma substance all decreased with the increasing of the expanding temperature.However, the contents of a small number of substances increased after the expansion. Through the sensory evaluation of control samples, the results showed. that the temperature process was the key point to improve the quality and aroma substances of expanded tobacco by CO2. Therefore, the characteristics of CO2 expansion and the features of raw tobacco determine the expansion process to relieve the loss of flavor components. By comparing the control samples under high to low expanding temperatures, it was showed that the dry and undesirable taste of smoke and the excessive use of expanded tobacco affected the coordination of cigarette smoke and caused other undesirable effects.2. Through this study, a reasonable series of process parameters can be worked out. The expanded tobacco is finally added into cigarette formula and the use ratio is 8%-26%. The processing conditions should change with the class of raw tobacco, the upper high class leaves are expanded by lower temperature, the middle class leaves are expanded by medium temperature, while the low class leaves are expanded by higher temperature. Therefore, the technical parameters of tobacco expansion are very important, the blend of expanded tobacco is also important. The expanding parameters must be determined based on the cigarette flavor, otherwise, the expanded tobacco will affect the cigarette flavor and its sensory quality. The expanded tobacco not only can decrease the tobacco consumption, but also can reduce the tar release. The study of tobacco expansion technology is always one of the important research fields in tobacco industry, through such sduty, our ultimate goal is to improve cigarette quality.