云南烟叶提取物的分子蒸馏分离及在卷烟中应用

Fractionation of Yunnan tobacco extract by molecular distillation and its application in cigarettes

为深入分析云南烟叶提取物性能,以乙酸乙酯为溶剂,通过提取玉溪、昆明和曲靖地区烟叶得到云南烟叶提取物(浸膏),并利用分子蒸馏方法将其分成4级轻组分和重组分共5个组分;采用GC-MS分析各组分的主要化学成分,并使用热失重方法分析比较各组分的热行为;通过感官质量评价比较各组分的卷烟加香效果。结果表明:从化学成分来看,一级和二级轻组分含有较多的挥发性香味成分,三级轻组分含有较多的半挥发性香味成分,而四级轻组分和重组分主要为非挥发性成分;从热学行为来看,4级轻组分的主要热失重温度分别为220、250、310和400℃,相互差异明显;从感官质量来看,一级和二级轻组分能改善卷烟香气质及香气量,而其他组分对口感和烟气指标有一定影响。

In order to deeply analyze the performance of Yunnan tobacco leaf extracts,tobacco leaves from Yuxi,Kunming and Qujing were extracted with ethyl acetate to obtain Yunnan tobacco extracts.The Yunnan tobacco extracts were separated into four-class light fractions and a final heavy fraction by four-step molecular distillation.The major chemical components in the five fractions were analyzed with GC-MS,the thermal behaviors of the five fractions were compared with TG-DTG,and the flavoring effects of the five fractions were compared with sensory evaluation methods.The results showed that Yunnan tobacco extracts could be separated into fractions with different functions.On chemical components,the first and second light fractions contained a high level of volatile components,the third light fraction had more semi-volatile components,while the forth light fraction and the final heavy fraction were rich in nonvolatile components.On thermal behavior,the weight loss temperatures for the four light fractions were 220,250,310 and 400℃,respectively.For sensory quality,the first and second fractions could improve the quality and quantity of cigarette aroma,while the other fractions influenced the taste and smoke indexes.