环境测试舱-热脱附-气相色谱法测定跑道面层材料的总挥发性有机化合物的释放速率

Determination of Emission Rate of Total Volatile Organic Compounds in Track Surface Materials by GC with Thermal Desorption and Emission Test Chamber

摘要: 跑道面层材料样品在稳定温度为60 ℃、相对湿度为45%的环境测试舱中平衡18 h，采用热脱附-气相色谱法对跑道面层材料的总挥发性有机化合物（TVOCs）释放速率进行分析。10种TVOCs特征化合物在一定范围内呈线性关系，检出限（3S/N）为0.21~0.41 μg·m^-3，测定值的相对标准偏差（n=8）为1.8%~3.8%。按标准加入法进行回收试验，回收率为91.5%~105%。

Abstract: The sample of track surface materials was placed in the emission test chamber for 18 h at a constant temperature of 60℃ and a relative air humidity of 45%, and then the emission rate of total volatile organic compounds (TVOCs) in track surface materials was analyzed by gas chromatography (GC) with thermal desorption. Linear relationships of 10 typical compounds in TVOCs were found in definite ranges, with detection limits (3S/N) in the range of 0.21-0.41 μg·m^-3. Values of RSDs (n=8) were in the range of 1.8%-3.8%. Test for recovery was made by standard addition method, giving results in the range of 91.5%-105%.