与环境烟气相关的挥发性有机物的特性

本项研究测定了环境烟气(ETS)中的多种挥发性有机物,在环境实验室中目标化合物的唯一来源就是ETS。实验室中的ETS是由燃吸肯塔基参考卷烟和其他8种市售卷烟产生的。在12轮试验中同时测定了30多种化合物。目标化合物分为3类,即:气相ETS标识物3乙基吡啶(简称3-EP)与烟碱、羰基化合物(包括甲醛)和挥发性有机化合物(简称VOCs)。利用环境实验室研究结果可以确定各种VOCs与3-EP(气相ETS标记物)的特征比率,另外还可以用来估测与ETS相关的VOCs的散发因子。总体说来,本项研究测得的特征比率与以往已经发表的实验室研究数据是一致的,这意味着,"真实"室内环境受多种来源的复杂的混合物影响。本项研究测定的特征比值也可以用于ETS目标化合物的定性和定量分析 

Characterization of volatile organic compounds associated with environmental tobacco smoke

In this study, a wide range of volatile organic constituents of environmental tobacco smoke(ETS) were determined using an environmantal chamber,where ETS is the sole source of target compounds. ETS was generated in an environmental chamber by a number of different cigarettes, including the Kentucky reference cigarette and eight different commercial brands. More than 30 compunds were measured simultaneously for a total of twelve experimental runs. The target compounds are classified into there major classes,i.e.vapor phase ETS markers including 3-ethylpyridine (3-EP) and nicotine carbonyl compounds including formaldehyde, and volatile organic compounds (VOCs). The results from the chamber study were used to generate characterized ratios of selected VOCs to 3-EP,a vapor phase ETS marker. Emission factors for VOCs associated with ETS were also estimated. The characteristic ratios appeared to be generally in good agreement with published data obtained by environmental chamber studies similar to this study. This implies that the ratios may be useful for identifying and quantifying the impact of ETS as a source of target compounds in ‘real world’ indoor environments, which is affected by a complex mixture of multi sources. The environmental chamber method described here provides a direct and reliable method to compare the ETS generated by different cigarettes. The method can also be applied to the simultaneous determination of many different ETS components.