The chemical compositions of tobacco leaf have direct influences on tobacco products quality. At present, the quality of domestic tobacco in comparison with foreign high-quality leaf has a big disparity, there is mainly a big difference in the tobacco leaf aroma and the fragrance quantity, it showed that the fragrance quantity is insufficient and the smoke is not gentle sufficingly. TheAroma Precursors is stability in the process of tobacco production and storage to avoid the loss of aroma, and can release ...