Study on Chemical Constituents and Aromatic Substances in Condensed Water of Closed-loop Tobacco Curing

In order to utilize condensed water in the process of closed-loop tobacco curing, the outflow rate of condensed water and the contents of chemical components and aromatic substances in the condensed water were studied. The results showed that the outflow rate of condensed water increased first and then decreased during the process of closed-loop curing, and the outflow rate was the largest at the end of yellowing and the lowest at the stem drying stage. The content of total plant alkaloid in condensed water increased gradually with the process of curing, and no total sugar, reducing sugar or protein was detected. Up to 24 aromatic substances were detected in the condensed water. The contents of aromatic substances such as benzyl alcohol, phenylethyl alcohol, 2,3-dipyridine and 3- hydroxy-2-butanone had the same order of magnitude as the contents in tobacco leaves.