Tobacco Science & Technology, 2009, 9, p. 47-9, ISSN.1002-0861

Thermogravimetric analysis of several domestic tobacco samples

WANG HONG-BO; GUO JUN-WEI; XIA QIAO-LING
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.