摘要
通过在西安城市道路隧道中设三个监测点对进入隧道的机动车排出的总烃（ＴＨＣ）和非甲烷烃（ＮＭＨＣ）浓度进行连续５天采样分析。结果表明城市机动车排放的碳氢化合物以非甲烷烃为主，非甲烷烃占总烃的８２５％，汽车排放ＴＨＣ和ＮＭＨＣ之间有极好的线性相关。
Five day measurements of THC and NMHC concentrations from motor vehicles at three monitoring points inside the Xian road tunnel were conducted.The HC that come from the motor vehicles driving on the urban main road,mainly was NMHC,which accounted for 82.5% of THC.Moreover,there is a good linear relationship between THC and NMHC of motor exhausted gas.The conversion formula between THC and NMHC was given by using statistical regression analysis.
