张家界桑植浓香型烤烟烟叶分切研究

采用TG-DTA、GC/MS等技术对湖南桑植浓香型烤烟烟叶分切后的叶尖、中间及叶基部位进行热反应分析以及常规化学成分、挥发性成分检测,并以烟叶常规化学成分和挥发性成分为指标进行分切段及全叶烟叶聚类分析。结果表明:①烟叶分切后,各段烟叶常规化学成分含量、挥发性成分相对百分含量、热失重比存在明显差异。叶尖部分烟叶的烟碱含量最高,叶尖和中间部分烟叶的还原糖和总糖含量较高,叶基部分烟叶的钾、氯和总氮含量较高。叶尖部分烟叶的茄哪士酮和棕榈酸含量较高,中间部分烟叶的苯甲醇、香叶基丙酮和肉豆蔻酸含量较高,叶基部分烟叶的新植二烯、3-呋喃甲醛、巨豆三烯酮和亚麻酸甲酯含量较高。中间部分烟叶热失重率最高,叶基部分最低。②不同的分切段烟叶可聚类到不同的类别,烟叶分切后可以形成不同的配方模块,拓宽烟叶原料使用范围,提高卷烟原料的保障能力。

Study on Chemistry of Different Portions of Robust Flavor Style Flue-cured Tobacco Leaf from Sangzhi, Zhangjiajie

The robust flavor type flue-cured tobacco leaf from Sangzhi in Zhangjiajie was sliced into three portions,including tip,middle portion,and base portion.Their routine chemical components,thermal reaction and volatile constituents were analyzed by TG-DTA and GC-MS.On the basis of routine chemical components and volatile constituents,cluster analysis for whole leaf and each leaf portion was carried out.The results showed that: 1) the three portions differed significantly in terms of the contents of routine chemical components,the relative contents of volatile constituents and thermo-gravimetric loss rate.The nicotine content in the tip was the highest,while the contents of reducing sugar and total sugar in the tip and middle portion and the contents of potassium,chloride and total nitrogen in the base portion were higher.The contents of solaventone and palmitic acid in the tip,the contents of benzyl alcohol,geranyl acetone and myristic acid in the middle portion,and the contents of neophytadiene,3-furaldehyde,megastigmatrienone and methyl linolenate in the base portion were higher.The thermal weight loss rate was highest in the middle portion and less in the base portion of the leaf.2) Different portions of the leaf could be clustered into different categories.Each portion of tobacco leaf could be integrated into different formulation modules,whereby to widen the range of tobacco to be used in cigarette production.