车内空气挥发性有机物浓度测量

Measurement of In-vehicle Concentration of Volatile Organic Compounds

利用热脱附-气相色谱/质谱法(TD-GC/MS)对家庭轿车、客车和环境空气中挥发性有机物进行定性和定量分析。结果表明,轿车和客车车内空气中挥发性有机物主要为烷烃和芳烃,分别占轿车和客车的车内空气中挥发性有机物的74.00%和71.88%,家庭轿车内空气中含有较多的含氧化合物;环境空气中TVOC浓度较低,分别仅为轿车和客车TVOC的7.95%和12.05%;轿车和客车车内空气中苯浓度较高,分别为环境空气中苯浓度的4.43倍和5.58倍。

The concentration of volatile organic compounds （VOCs） in cars, buses and ambient air are qualitatively and quantitatively analyzed by means of thermal desorption and gas chromatography-mass spectrometry （TD-GC/MS）. The results show that alkanes and aromatics are the main VOCs in vehicles and account for 74.00% and 71.88% of total volatile organic compounds （TVOC） in cars and buses respectively, and there are also more oxygenic compounds in cars. In addition, the concentration of TVOC in ambient air is relatively low, being only 7.95% and 12.05% of those in cars and buses, and the concentration of benzene in cars and buses is relatively high, being 4. 43 and 5.58 times of that in ambient air.