Tobacco Science & Technology, 2009, 9, p. 47-9, ISSN.1002-0861
Thermogravimetric analysis of several domestic tobacco samples
Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, Henan, China
The thermogravimetric analysis of several domestic tobacco samples was conducted. The results showed that: 1) from room temperature to 500°, under the non-isothermal conditions, tobacco goes through 4 stages, i.e. loss of adsorbed water and crystal water, volatilization and decomposition of small molecule compounds, pyrolysis of macromolecular compounds, and coking, the pyrolysis takes place mainly between 220 ° and 410 °; 2) flue-cured, Burley and Oriental tobacco leaves are recognizable by their differential thermogravimetric (DTG) curves; 3) thermogravimetric character of expanded tobacco is similar to that of reconstituted tobacco, it is significantly different from that of expanded cut stem; 4) there are some differences between DTG curves of C3F of cultivar K326 grown in Yunnan, Hunan, Hubei, Henan and Fujian Provinces in 2007, mainly in their weight-loss at different stages.