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针对空气净化器对室内TVOC污染物净化效果测定方法的不完善,建立利用二次热解吸-气相色谱法测定空气净化器对室内空气TVOC污染物的净化效果。采用Tenax-TA吸附管采集样品,通过二次热解吸进行脱附,再利用气相色谱法进行定量分析。本方法测定TVOC的检出限为0.1~0.4μg/m~3,平均回收率为83.1%~90.3%,测定值的相对标准偏差(n=6)在0.97%~2.57%之间。该方法具有简便、快速、灵敏准确度高的优点,适用于空气净化器对室内TVOC污染物净化效果的快速检测。
Aiming at the imperfection of the air purifier on the determination of indoor TVOC pollutant purification effect, the purifying effect of air purifier on TVOC pollutants in indoor air was established by using secondary pyrolysis gas chromatography. Samples were collected using a Tenax-TA adsorption tube, desorbed by secondary thermal desorption, and quantified by gas chromatography. The detection limit of TVOC was 0.1 ~ 0.4μg / m ~ 3 and the average recovery was 83.1% ~ 90.3%. The relative standard deviations (n = 6) of the measured values ranged from 0.97% to 2.57%. The method has the advantages of simple, rapid and sensitive high accuracy and is suitable for the rapid detection of indoor TVOC pollutant purifying effect by the air purifier.