热脱附-气相色谱-质谱法分析处理烟丝中主要香气成分的含量

Analysis of Main Flavor Components in Treated Tobacco by Thermal Desorption-Gas Chromatography-Mass Spectrometry

为对比分析高温气流式叶丝烘干机(HXD)和滚筒烘丝处理过程后烟丝中香气主要成分的差别,利用热脱附技术提取和富集烟丝中的香气成分,以气相色谱-质谱法获取烟叶香气组分的色谱图,并以内标为参照,计算烟叶中各香气成分的相对含量.结果表明:(1)经过HXD处理之后烟丝中大部分香气成分含量要低于传统烘丝工艺,HXD烟丝香气成分平均值为传统烘丝的91%,但吡啶、多羟基化合物A和多羟基化合物B等成分下降幅度远远高于平均值;(2)HXD处理之后烟丝中2-乙酰呋喃、泛酰内酯等物质的含量反而高于传统滚筒式烘丝.本实验结果可以为HXD烘丝工序参数设计及卷烟调香提供重要的理论参考.

In order to investigate the change of the main flavor components in tobacco after high expansion drying（HXD） and drum-type cut-tobacco, a novel method for the determination of flavor components in tobacco was established by using thermal desorption-gas chromatography-mass spectrometry. The flavor components were extracted and enriched by thermal desorption, and then analysised by GC-MS. The relative contents of the flavor components were quantitated by internal standard method. The results indicated that the contents of main flavors in tobacco after HXD were a little lower than those after drum-type cut-tobacco, and the contents of polyhydroxy compound A, polyhydroxy compound B and pydine in tobacco after HXD were less than those after drum-type cut-tobacco by a large margin. But the contents of 2-acetyl furan and pantolactone in tobacco after HXD were higher than those after drum-type cut tobacco. The results of the testing can provide important referrence for the optimization of the parameters in cut-tobacco and tobacco perfumery.