轿车内苯系物的质量浓度特征

Mass Concentration Characteristics of In-car Benzene and its Derivatives

利用热解吸气相色谱法对轿车内苯系物进行检测,利用逐步回归法对其影响因素进行多元线性回归分析。结果表明,轿车内苯系物浓度相对较高,车内苯、甲苯、乙苯和二甲苯质量浓度均值分别是89.2、230.2、80.6和196.4μg/m3;车外环境、车龄、温度、湿度、气流、排量、通风方式、内饰类型和车辆档次对车内苯系物浓度都有影响,其中车龄影响最大,其次是温度。

The in-car concentration of benzene and its derivatives is measured with thermal desorption gas chromatography,and a multivariate linear regression analysis is conducted on their influence factors by stepwise regression.The results indicate that the in-car concentrations of benzene and its derivative are relatively high,the mean concentration of benzene,toluene,ethylbenzene and xylene is 89.2,230.2,80.6 and 196.4μg/m3 respectively.Outdoor environment,car age,temperature,relative humidity,airflow,engine displacement,the way of ventilation,the type of interior trim and the category of car all have effects on the in-car concentration of benzene and its derivatives,in which car age has the most effect with temperature next to it.