Purpose To explore suitable moistening modes for flue-cured tobacco leaves of different grades, providing a technical basis for differential moistening of core raw materials for cigarette brands.
Methods Two kinds of flue-cured tobacco leaves (Honghe Mile K326 C1F and Qujing Honghuadajinyuan B1F) were selected as test materials. Under the condition that the secondary moistening mode (steam+damp hot wind) remains unchanged, four primary moistening modes were set as follows: steam+water, dry hot wind+water, steam+damp hot wind+water, and steam+dry hot wind+water. The differences in routine chemical indexes, volatile aromatic components, starch, pectin, petroleum ether extract, total polyphenols, plastid pigments, and the chemical components usability index (CCUI) of tobacco leaves under different moistening modes were analyzed.
Results 1) There were obvious differences in the outlet temperature and the contents of many chemical components in the same flue-cured tobacco under different moistening modes. 2) The primary moistening of K326 C1F flue-cured tobacco was more suitable for the steam+damp hot wind+water mode, while the primary moistening of Honghuadajinyuan B1F flue-cured tobacco was more suitable for the steam+dry hot wind+water mode.
Conclusion Different moistening modes have varied effects on the chemical components of the same tobacco raw materials, and different moistening modes are suitable for different tobacco raw materials. This study provides a technical basis for the differential moistening mode of different tobacco materials.
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