加热卷烟烟叶原料低温热解特性及其与感官品质相关性分析
Low temperature pyrolysis characteristics of heated tobacco raw materials and its correlation with sensory quality
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摘要: 采用热重技术对烤烟、白肋烟、香料烟、雪茄烟原料的低温热解特性进行分析,同时对烟叶原料在加热条件下的感官品质进行评价,并进一步统计分析热解特性与感官品质之间的相关关系。结果表明:各烟叶在线性升温-恒温烘焙的加热条件下均经历4个失重阶段(脱水干燥阶段、挥发性成分脱除阶段、纤维素类成分分解阶段和恒温烘焙阶段),但在不同失重阶段中的热解特征参数存在一定差异;随着甘油施加量的升高(0%~15%),各烟叶原料在挥发性成分脱除阶段的最大失重速率及失重率均有所增大,烤烟的最大失重温度有所提高,而白肋烟、香料烟、雪茄烟则有所降低;当甘油施加量为15%时,其对烤烟在该阶段的失重率影响最大,对香料烟的影响最小;随着甘油施加量的增大,各烟叶样品的感官品质总分均有所提高;甘油施加量与烟气量、香气量、均匀性得分及感官品质总分呈极显著正相关,最大失重速率与杂气、刺激性、劲头得分及感官品质总分之间存在明显正相关关系,纤维素类成分分解阶段的最大失重速率与香气量、杂气、刺激性、纯净度、劲头得分及感官品质总分间存在负相关关系。Abstract: Thermogravimetric technology was used to analyze the low temperature pyrolysis characteristics of flue-cured tobacco, burley tobacco, oriental tobacco and cigar tobacco. Meanwhile, the sensory quality of tobacco raw materials under heating conditions was evaluated, and the correlation between the pyrolysis characteristics and sensory quality was further analyzed statistically. The results showed that: under the heating condition of linear temperature-constant temperature baking, all tobacco leaves experienced four weight loss stages (dehydration and drying stage, removal stage of volatile components, decomposition stage of cellulose components and constant temperature baking stage), but there were some differences in the pyrolysis characteristic parameters of different weight loss stages. With the increase of glycerin content (0%~15%), the maximum weight loss rate and weight loss rate of all tobacco raw materials in the volatile component removal stage increased, and the maximum weight loss temperature of flue-cured tobacco increased, while that of burley tobacco, oriental tobacco and cigar tobacco decreased. When the glycerin dosage was 15%, it had the greatest effect on the weight loss rate of flue-cured tobacco at this stage, and the least effect on oriental tobacco. The total score of sensory quality of tobacco leaf samples increased with the increase of glycerin dosage. Person correlation analysis showed that the glycerin content of tobacco leaf raw materials was positively correlated with the smoke volume, aroma volume, uniformity score and total sensory quality score. There was a significant positive correlation between the maximum weight loss rate and miscellaneous gas, irritability, energy score and total sensory quality score, while the maximum weight loss rate during the decomposition stage of cellulose components had a negative correlation with aroma volume, miscellaneous gas, irritation, purity, energy score and total sensory quality score.
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