烟叶干馏香料的制备及在加热卷烟中的应用

Preparation of tobacco dry distilled flavors and their applications to heated tobacco products

为开发用于加热卷烟的核心香料,选取国内外不同产区烟叶原料制备烟叶干馏香料,并利用分子蒸馏技术进一步精制得到不同组分。采用GC-MS和热重分析技术考察分子蒸馏前后干馏香料的成分及热分解行为差异。结果表明:(1)巴西烟叶干馏香料中的烟碱、吡啶类、糠醛类和酮类化合物的质量分数较高,而呋喃类、吡喃酮类化合物的质量分数较低;由湖南、河南和云南等产区烟叶制备的干馏香料各自均有质量分数较高的特征成分。(2)采用分子蒸馏技术精制巴西、云南烟叶干馏香料得到的轻组分中含有较多的烟碱及挥发性香味成分,并且在220℃以下可完全热分解释放;分子蒸馏后得到的重组分中非挥发性成分较多,其热分解过程分布在110~350℃温度范围内。(3)将烟叶干馏香料及分子蒸馏产物应用于加热卷烟中,对加热卷烟的抽吸品质有一定的改善作用,以提升劲头、香气质和香气量以及改善口感为主;轻组分的提升效果更加全面,重组分可有效提升烟香的前后一致性。

In order to develop key flavors for heated tobacco products,tobacco leaves from domestic and overseas were selected to prepare dry distilled flavor samples.The molecular distillation technology was applied to further refine flavor samples to obtain targeted light and heavy fractions.GC-MS and thermogravimetric analyses were used to investigate the differences in components and pyrolysis behaviors of the dry distilled flavor samples before and after molecular distillation.The results showed that:1)Mass fractions of nicotine,pyridines,furfurals and ketones in the dry distilled flavor from Brazil leaf were higher,while those of furans and pyrones were lower.The dry distilled flavor samples prepared from Hunan,Henan and Yunnan tobacco leaves all presented higher mass fractions of characteristic components.2)The light fractions obtained from the dry distilled flavor samples from Brazil and Yunnan tobacco leaves by molecular distillation contained greater mass fractions of nicotine and volatile aroma components,and could be thermal decomposed and released below 220℃completely.The heavy fractions contained higher mass fractions of non-volatile components,and their corresponding thermal decomposition process was distributed in the temperature range of 110~350℃.3)The applications of tobacco dry distilled flavor samples and their molecular distillation products promoted the sensory quality of heated tobacco products to a certain degree,mainly in the strength,aroma quality,aroma quantity and taste.The promotion effects of the light fractions were more significant,while the heavy fractions effectively improved the consistency of aroma during smoking.