两种产地的红大烟叶热解产物及感官差异性研究

Study on Pyrolysis Products and Sensory of Hongda Tobacco from Two Producing Areas

与烟草燃烧过程相比,烟草热解过程释放的烟气中致香物质是确定烟草质量的关键。本工作分别采用云南省保山市红大品种的中部烟叶(X1)和大理州红大品种的中部烟叶(X2)为原料,模拟实际烟草烟气致香物质的释放环境,通过烟气精确捕获、GC-MS分析研究烟草热解释放致香物质的特点,考察热解温度、吹扫时间、气料比、投加量等不同热解条件对致香物质的影响,同时对以上样品进行评吸实验及热解和燃烧实验对比以确定烟气中致香物质与烟草感官质量的关系。结果表明:不同的热解条件会影响不同种类的致香物质释放;对比不同产地的同种红大烟叶(X1和X2)可知,红大品种的中部烟叶X1样品烟草热解烟气致香物质中酸类、醛类、酚类、醇类、烯类、酯类、萜类物质相对含量较高且具有更佳的吃味和香气属性;样品在不同热解条件下的产物分布存在明显的差异且烟气中化学成分也不同,最终造成烟草的感官品质也不尽相同。

Compared with the tobacco combustion process,the aromatic substances released by tobacco pyrolysis are the key to determine thesensory quality of tobacco.To simulation of the actual tobacco smoke aromatic subsrances release environment,the Hongda tobacco central leaves(X1)from Baoshan city and Hongda tobacco central leaves(X2)from Dali city were used as raw materials.Through accurate capture and GC-MS analysis,the behavior and characteristics of aroma constituents by pyrolysis in flue-cured tobacco leaves were studied.Investigated the effects of pyrolysis temperature,purge time,gas material ratio and dosage on aroma substances.Furthermore,the above samples were evaluated and compared with pyrolysis and combustion experiments to determine the relationship between the aroma substances in smoke and tobacco quality.The results show that different pyrolysis conditions could affect the release of different types of aroma substances.Meanwhile,comparing the taste and pyrolysis components of the same tobacco leaves(X1 and X2)from different origins,the study found that the contribution of phenols,alcohols,alkenes,esters and terpenoids to smoke aroma was relatively high in X1,and it has better taste and aroma properties.Under different pyrolysis conditions,the product distribution of samples is obviously different and the chemical composition of smoke is also different,resulting in different sensory quality of tobacco.The samples are processed in different ways(pyrolysis and combustion),and there are obvious differences in the classification and distribution of the products due to the different reaction environments.Different origins also affect the chemical composition of the smoke,which affects the quality of the tobacco.