热解析–气相色谱–质谱法测定汽车零部件及内饰材料中挥发性有机化合物

将待测材料直接放在热解析管中,用热脱附–气相色谱–质谱法对挥发性有机化合物的含量进行检测。经试验优化,热解析时间选择为30 min。在10~500μg/m L范围内,7种苯系物的质量浓度与对应色谱峰面积线性相关,相关系数为0.998 3~0.999 6。方法的加标回收率为80.3%~98.1%,测定结果的相对标准偏差为3.37%~5.42%(n=7)。该方法具有操作简便、提取效率高和全自动化等优点,适用于汽车零部件及内饰材料中挥发性有机化合物的检测。

Determination of Volatile Organic Compounds in Automobile Components and Interior Materials By Thermal Desorption-Gas Chromatography-Mass Spectrometry

The material to be measured was directly placed in the heat pipe, and VOC content was determined by thermal desorption gas chromatography mass spectrometry. The thermal analysis time was optimized to be 30 min. In the range of 10–500μg/mL, the concentrations of seven kinds of VOCs had linear relation with chromatography peaks with the corelation coefficients of 0.998 3–0.999 6. The recoveries were in the range of 80.3%–98.1% with the relative standard deviations of 3.37%–5.42%(n=7). The method has the advantages of simple operation, high efficiencyand total automation, and it is suitable for the detection of volatile organic compounds in automotive components and interior materials.