Abstract:

In order to improve the content of dihydroactinidiolide in domestic paper-making reconstituted tobacco, the reasons for the high content of dihydroactinidiolide in imported reconstituted tobacco were analyzed. Three kinds of domestic reconstituted tobacco (tobacco 1 was without β-carotene colorant, and the contents of β-carotene in tobacco 2 and 3 were 55 and 85 μg/g, respectively), one kind of imported reconstituted tobacco (the content of β-carotene in tobacco leaves was 240 μg/g) and one kind of high β-carotene (the content of β-carotene in tobacco leaves was 330 μg/g) were selected to determine the content of dihydroactinidiolide in finished products and raw materials, and to track the dynamic changes of β-carotene and dihydroactinidiolide during 12 months of storage. Results showed that: (1) the retention rate of dihydroactinidiolide in domestic reconstituted tobacco (tobacco 1) without β-carotene colorant was only 30%, while that in domestic group (tobacco 2 and 3) and imported group (tobacco 4) with β-carotene colorant was 130%-375%, and the addition amount of colorant was positively correlated with the content of finished products. (2) The content of dihydroactinidiolide in imported reconstituted tobacco was much higher than that of raw materials, due to the use of β-carotene colorant in the process of reconstituted tobacco production by its degradation. (3) The large difference in dihydroactinidiolide content in domestic and imported reconstituted tobacco was due to the use of high content of β-carotene colorants in imported reconstituted tobacco, and in the process of storage, the high content of β-carotene degradation produced a high content of dihydroactinidiolide. This study can provide technical support for increasing the content of dihydroactinidiolide in domestic reconstituted tobacco. It also plays a positive guiding role in the use and storage of reconstituted tobacco.

Key words: paper-making reconstituted tobacco, dihydroactinidiolide, colorant, β-carotene, degradation, storage