浓香型产区烤烟中性致香成分与生物碱组成及含量

为了明确浓香型产区烟叶中性致香成分和生物碱的特点，对浓香型8个产区的烟叶样品的中性致香物质与生物碱的组成和含量进行了分析测定。结果表明，中性致香成分总量河南豫中南烟区最高，达1107.93μg/g，安徽皖南最低，仅为558.04μg/g。类胡萝卜素降解产物中的β-大马酮、β-二氢大马酮，棕色化反应产物中的糠醛，芳香族氨基酸裂解产物中的苯甲醇、苯乙醛、苯乙醇，西柏烷类降解产物中的茄酮、新植二烯的含量，较同类降解产物所占的比重较高。8个浓香型产区烤烟总生物碱和烟碱的变化幅度为2.33%～3.71%和2.05%～3.31%，平均值分别为2.71%和2.40%。所有浓香型产区降烟碱含量都比较低，且低于5%。不同浓香型产区中性致香物质的含量差异显著，8大浓香型产区烤烟烟碱含量都在优质烤烟的要求范围内。

Composition and Contents of Neutral Aroma Components and Alkaloids in Flue-Cured Tobacco from Full Flavor Tobacco Growing Regions

In order to understand the characteristics of composition and contents of neutral aroma components and alkaloids in flue-cured tobacco from full flavor tobacco growing regions, Tobacco leaf samples from eight full-flavor tobacco growing regions were taken and determined. The results showed that total content of neutral aroma components was the highest （1107.93 μg/g） in central and south of Henan Province, the lowest （ 558.04 μg/g） in south of Anhui. The contents of β-damascone and β-Dihydro damascone degraded by carotene, furfural of brown reaction products, benzyl alcohol, phenyl acetaldehyde, phenyl ethyl alcohol of aromatic amino acid cleavage products, and solanone and neophytadiene of alkane degradation cypress products were all higher than similar products. There was significant difference among regions, reflecting the style characteristic of flue-cured tobacco from full flavor tobacco growing regions. Alkaloids content ranged from 2.33%to 3.71%, with a mean of 2.71%. Nicotine content ranged from 2.05%to 3.31%, with a mean of 2.40%. Nornicotine contents of full-flavor tobacco growing regions were all lower and less than 5%. The content of neutral aroma components existed significant difference among regions. Alkaloids of flue-cured tobacco in 8 full-flavor growing regions all fall in the range of good quality flue-cured tobacco range.