“三段式”分切烟叶醇化品质差异性比较与分析

Quality Difference of Aging Tobacco Leaf by Three Section Cutting

为研究经＂三段式＂分切后醇化烟叶品质的差异性。采用电镜扫描、傅里叶红外对烟叶表面结构及基团变化进行分析。结果表明,叶尖部分表面结构紧密,另外,烟叶羧基及氮类含量明显不同,对红外图谱进行二阶导数分析,发现样品在700~1 200 cm-1区域内二阶导数光谱存在显著差异。对分切后烟叶的常规化学成分、色素及致香成分分析表明,叶中部分糖含量最高,同时总氮及叶绿素含量最低;而叶基部分致香成分相对较高。总体评价结果,叶中部分品质最好,叶尖次之,叶基较差。

Quality difference of aging tobacco leaf by three section cutting was investigated in this study.Electron microscopy analysis indicated that the difference of tobacco leaf surface structure was significant and there was tighter structure on surface of tobacco leaf tip.Surface groups difference was detected by fourier transform infrared spectrometry and content of carboxyl group and nitrogen group was difference.For the purpose of enhancing spectra resolution,the difference the second-derivative spectra was selected for evaluating the difference of tobacco leaf and obvious difference was observed in region of 700-1 200 cm-1,which suggested that varieties of sugar content among the three samples.Furthermore,the analysis of chemical component,pigment and aroma constituents showed that the sugar content of tobacco leaf center was the highest,while corresponding total nitrogen and chlorophylls was the lowest.However,the content of aroma constituents of tobacco leaf base was the highest.The final results showed that the quality of leaf center was the best,the next was leaf tip and the last was leaf base.