Abstract: To explore the effects of glycerol application amount on the pyrolysis and aroma release characteristics of oriental tobacco particles，the oriental tobacco particles with glycerol application amount of 0，10%，15%，20%，25% and 30%（denoted as XLY⁃0，XLY⁃10，XLY⁃15，XLY⁃20，XLY⁃25 and XLY⁃30，respectively） were used as research objects. Combined with thermogravimetric analysis，programmed temperature control platform and gas chromatography⁃mass spectrometry（GC⁃MS）technology，the thermogravimetric process and release characteristics of various aroma components of oriental tobacco particles under different glycerol application conditions were analyzed.The results showed that the application of glycerol could significantly change the thermal weight loss characteristic parameters of oriental tobacco particles，increase the maximum weight loss rate and weight loss rate of stage Ⅱ，and reduce the maximum weight loss rate and weight loss rate of stage Ⅲ. With the increase of glycerol application amount，the total release amounts of neutral and alkaline aroma components exhibited an initial increase followed by a decrease. The maximum values of these two components were obtained in the XLY⁃10 group，reaching 2 182.34 μg/g and 628.25 μg/g，respectively.The total release amount of acidic aroma components peaked in the XLY⁃15 group at 1 431.70 μg/g，among which 3⁃methylpentanoic acid accounted for 36.17% of the acidic aroma components in this group. Cluster analysis showed that XLY⁃10 was classified into one group，XLY⁃15 and XLY⁃20 were clustered into one group，XLY⁃25 and XLY⁃30 were clustered into one group. The change rate of aroma components in each sample was alkaline>neutral>acidic，while differences in change rates existed among groups.Twenty⁃two volatile components with great contribution to sample classification，including dihydroactinidiolide，γ⁃butyrolactone and 2，3⁃dimethylpyridine，were screened out by partial least⁃squares discriminant analysis.In conclusion，glycerol application amount can significantly affect the pyrolysis⁃weight⁃loss behavior and aroma⁃release characteristics of oriental tobacco particles，further promoting the release of key aroma components.This study can provide a reference for improving the sensory quality of heat⁃not⁃burn tobacco cores.

Key words: Oriental tobacco, Tobacco particles, Glycerol, Pyrolysis, Aroma release characteristics, Thermogravimetric analysis

摘要： 为探究甘油施加量对香料烟颗粒热解及香味释放特性的影响，以甘油施加量分别为0、10%、15%、20%、25%、30%的香料烟颗粒（依次记为XLY-0、XLY-10、XLY-15、XLY-20、XLY-25、XLY-30）为对象，联合热重分析、程序控温平台与气相色谱-质谱联用（GC-MS）技术，解析不同甘油施加量条件下香料烟颗粒的热失重过程与各类香味成分释放特性。结果表明，甘油施加可显著改变香料烟颗粒热失重特征参数，提高阶段Ⅱ的最大失重速率与失重率，同时降低阶段Ⅲ的最大失重速率与失重率。随甘油施加量升高，中性、碱性香味成分释放总量均呈先升高后降低趋势，XLY-10组达到最大值，分别为2 182.34、628.25 μg/g，酸性香味成分释放总量在XLY-15组达到最高（1 431.70 μg/g），其中3-甲基戊酸占该组酸性香味组分的36.17%。聚类分析显示，XLY-10单独归为一类，XLY-15与XLY-20聚为一类，XLY-25与XLY-30聚为一类。各样品香味成分变化率整体表现为碱性>中性>酸性，但组间变化率存在差异。经偏最小二乘法判别分析筛选得到二氢猕猴桃内酯、γ-丁内酯、2，3-二甲基吡啶等22种对样品分类贡献较大的挥发性成分。综上，甘油施加量能够显著影响香料烟颗粒的热失重行为与香味释放特性，进而促进关键香味成分释放，可为加热卷烟烟芯感官品质改善提供参考。

关键词: 香料烟, 烟草颗粒, 甘油, 热解, 香味释放特性, 热重分析