| The environment tobacco smoke (ETS) is one of the important pollutions, which affects the indoors air quality and causes a series of health risks including cancer for the people exposed to ETS. Increasing academic attention has been paid to the environmental problems induced by ETS. By means of simulation experiment and measurement of actual indoor smoking/nonsmoking environment, a study of the organic pollution of indoor air effected by ETS was carried out in this paper.(1) With reference to National Institute for Occupational Safety and Health (NIOSH) nicotine analysis method, a method of simultaneous determination of nicotine and 3-ethenylpyridine (3-EP) was established to monitor its contains in indoor tobacco smoking air, combining proceeding quality assurance and quality control. The detection limit and the mean desorption efficiencies are 0.075μg/sample and 91.80% for nicotine, and 0.089/sample and 95.90% for 3-EP, respectively. And the analytical precisions of duplicate pairs are less than 5.26%.(2) The simulation experiment of tobacco smoking environment was conducted in a test room (an actual office room was used) under different conditions such as cigarette brands, number of cigarettes smoked, and post-smoke decay in forced ventilation or in closed indoor environments. 37 chemical species and exposure concentrations were targeted and monitored, including volatile organic compounds (VOCs), and ETS markers. Factor analysis, cluster analysis and relation analysis were used in the data process. The results indicate:(1)Benzene, d-limonene, styrene, m-ethyltoluene and 1,2,4/1,3,5-trimethylbenzene are correlated well with ETS markers, but toluene, ethylbenzene, m,p-xylene and o-xylene are not evidently correlated with ETS markers because there are some potential indoor sources of these compounds. The VOCs such as α-pinene, β-pinene, camphene, Tetrachloroethene , trichloroethene , tetrachloromethcme 1,1,2-trichloroethane, 2-chlorotoluene,emd even carbon n-alkanes (n-octane, n-decane) , etc. mainly come from nonsmoking sources, as they aren't evidently correlated with ETS markers. However, odd carbon n-alkanes (n-nonane, n-undecane) show better correlation with ETS markers.(2)2,5-dimethylfuran is considered to be a better ETS marker due to relative stability in different cigarette brands and good relationship with nicotine and 3-EP. It was identified only in tobacco smoking environment with abundant concentration and more stable than nicotine.(3)The VOCs concentrations emitted by tobacco smoking were positively linearly associated with the number of cigarettes consumed, and different behaviors for different VOCs were observed in closed indoor environment, of which ETS markers, d-limonene, styrene, 1,2,4/1,3,5-trimethylbenzene, m-ethyltoluene, etc. decayed fast, and the 1st order kinetics is obeyed by these compounds during their post-smoke decay periods;whereas benzene, toluene, xylene, ethylbenzene, etc. decayed slowly and even increased in primary periods of the decay. But all of them rapidly decayed under enforced ventilation. Hence, ETS exposure in closed environment is more harmful, and ventilation may be one of the best means to decrease indoor ETS concentration.The VOCs concentrations emitted by different brand cigarettes vary significantly. The relative percentage constituent of ETS markers and 8 C13of nicotine for different brand cigarettes emissions are diverse, but the relative percentage constituent of ETS markers is similar and 8 C13 of nicotine is consistent for the same brand cigarette emissions. The higher tar full flavor cigarettes (FF) burning produces more harmful constituents , such as nicotine, 2,5-dimethylfuran, d-limonene, benzene, toluene, xylene and PM.2.5, and the releases of full flavor low tar cigarettes(FFLT) and ultra low tar cigarettes(ULT) are almost equal, but less than that of the full flavor cigarettes. However, with the tar increasing from ULT to FFLT and FF, the styrene concentration decreases reversibly.(3) A comparative research for the toxic VOCs concen...
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