低温加热状态下烤烟气溶胶释放量及其影响因素

为考察烟草在低温加热状态下气溶胶释放特性,采用自制稳态热解装置和烟密度计联用测试系统(SSTF-SDG)建立了可定量表征气溶胶释放量的烟草质量光密度(D_m)测试方法,考察了全国不同产区、品种、部位共34种烤烟样品在低温加热状态下的D_m,并对D_m与烤烟主要元素及常规化学成分的关系进行了统计分析。结果表明:①基于SSTF-SDG,该方法可分析低温加热状态下烟草D_m。②D_m与烟草中碳、氢、氮、烟碱均在0.01水平显著正相关,与钾硫比、钾氮比、(碳+氢)/氧以及糖碱比均在0.01水平显著负相关。③D_m各影响因素重要性排序依次为:碳 > 烟碱 > 钾硫比 > 氮 > 钾氮比 > 氢 > (碳+氢)/氧 > 糖碱比 > 硫 > 钾 > 总糖 > 氧 > 还原糖 > 氯 > 钾氯比。④由碳、氮和钾硫比为自变量的回归方程可较好地评价烤烟烟叶低温加热状态下气溶胶释放量。 

Amount of Aerosol Released from Flue-cured Tobacco Leaves Heated at Low Temperature and Influencing Factors Thereof

In order to investigate the emission characteristics of aerosol from tobacco heated at low temperature, a method of determining mass optical density(D_m) for quantitatively characterizing aerosol yield was developed, wherein a purpose-made steady state pyrolysis device was linked to a smoke density gauge(SSTF-SDG). The values of 34 flue-cured tobacco samples of different varieties from different stalk positions and growing areas were determined, and the correlations of D_m with the major elements and routine chemical components in tobacco were statistically analyzed. The results showed that: 1) On the basis of SSTF-SDG, this method could successfully analyze the D_m of tobacco heated at low temperature. 2) D_m significantly positively correlated to the contents of carbon(C), hydrogen(H), nitrogen(N) and nicotine(Nic) at 0.01 level, while significantly negatively correlated to the ratios of potassium to sulfur(K/S), potassium to nitrogen(K/N), carbon plus hydrogen to oxygen (C+H)/O], and reduced sugar to nicotine(RS/Nic) at 0.01 level. 3) The influencing factors in the order of significance on D_m were C > Nic > K/S > N > K/N > H > (C+H)/O > RS/Nic > S > K > total sugar > O > RS > Cl > K/Cl. 4) The regression equation with C, N and K/S as independent variables could well predict theamount of aerosol released from flue-cured tobacco heated at low temperature.