关键词: 烤烟, 有机酸, 烟气有害成分, 因子分析, 灰色关联度分析

Abstract: In order to reduce the harmful components in cigarette smoke, and systematically describe the effects of tobacco leaf chemical components on burst size of harmful  cigarette mainstream smoke, this paper took the flue-cured tobacco samples from the main aromatic tobacco producing areas in 2014 as test material, and carried out studies by factor analysis and grey correlation method. The results showed that 8 representative organic acids were extracted using factor analysis, including oxalic acid, fumaric acid, malic acid, citric acid, malonic acid, hexadecanoic acid, oleic acid and stearic acid. The grey correlation analysis showed that the correlation degree of 5 non-volatile organic acids(oxalic acid, malonic acid, fumaric acid, malic acid and citric acid) and 7 harmful components (CO, HCN, NNK, NH3, B\[a\]P, phenol and crotonaldehyde), and tar content, cigarette hazard index were higher, especially the correlation of oxalic acid on harmful components had high correlation index. While that of the higher fatty acids, such as palmitic acid, oleic acid, stearic acid on cigarette hazard index of 7  harmful components and tar were relatively lower. In general, the non-volatile organic acids in flue-cured tobacco had great influences on the harmful components of cigarette mainstream smoke, while the higher fatty acids had relatively smaller effect.

Key words: flue-cured tobacco, organic acid, harmful components of cigarette smoke, factor analysis, grey correlation analysis