室内空气中总挥发性有机物的热解吸-毛细管柱气相色谱测定法

目的:建立热解吸-毛细管柱气相色谱法测定室内空气中总挥发性有机物(TVOC)的方法。方法:用活性炭管吸附,热解吸进样,FFAP大口径毛细管气相色谱法对室内空气中24种挥发性有机物进行分离和测定。结果:24种挥发性有机物的线性方程相关系数为0.9963～0.9999,相对标准偏差为0.3%～7.8%,其中苯、甲苯、二甲苯的检出限为(0.5～1)×10-3μg/ml。结论:该方法操作简便,对仪器设备要求不高,准确灵敏,适用于空气中总挥发性有机物和低浓度组分有机物的测定。

Determination of total volatile organic compounds in indoor air by thermal desorption-capillary gas chromatography

Objective:To establish a method for the determination of total volatile organic compounds in indoor air by thermal desorption-capillary gas chromatography.Methods:Indoor air samples were collected with active carbon tubes and thermal desorbed,24 volatile organic compounds were determined by GC with FFAP capillary column separation.Results:The correlation coefficients of the method ranged from 0.9963 to 0.9999;the RSDs ranged from 0.3% to 7.8%.The detection limits of benzene,toluene,xylene ranged from 0.5×10-3 to 1×10-3 μg/ml.Conclusion:The method is simple,accurate and sensitive.It is applicable for determining total volatile organic compounds and low level of volatile organic compounds in indoor air.