松针燃烧排放物的热重桥/质谱在线监测方法

森林火灾排放物主要包含气体、挥发性有机化合物(VOCs)、和半挥发性有机化合物(SVOCs)，这些物质会严重威胁消防队员和居民的健康。森林火灾烟气是一种包含固体颗粒、液体和气体化合物的复杂混合物。在火前锋附近(靠近消防队员)或者离火前锋很远(但靠近居民)的地方，当苯、甲苯、烯烃等有机化合物的浓度超过各健康安全组织规定的极限值，就可能对健康产生影响。本文给出了一种使用室内热重桥一质谱联用对炉内松针燃烧实验进行火前锋排放物在线监测的新方法。该燃烧实验被认为含氧量较低，这是真实森林火灾中通常的情形。使用这种方法测量得到的苯和甲苯的最大浓度分别是1050和2050ppm。CO2的最大浓度超过10．000ppm。

Use of a TG-Bridge / Mass Spectrometry Method for On-line Monitoring the Emissions of Pine Needles Combustion

Forest fire emissions consist mainly of gases, Volatile Organic Compounds (VOCs) and Semi Volatile Organic compounds (SVOCs) and can have serious short and long term health implications on the firefighters and the civilians. Forest fire smoke is a complex mixture of particles, liquids and gaseous compounds. VOCs such as benzene, toluene, alkenes might have health impacts if their concentrations, near the fire-front (fire fighters case) or in long distances from the fire-front (civilians case), exceed the permissible exposure limits defined by various health safety organizations. In this work a new method is presented for on-line monitoring the fire-front emissions of pine needles combustion in furnace experiments, by using an in house made TG-bridge conjucted with a mass spectrometer. This combustion is considered as of a low oxygen content, a scenario which usually occurs in real forest fires. The maximum concentrations for benzene and toluene measured by using this method were 1050 and 2050 ppm respectively. The maximum concentration of CO_2 determined was more than 10.000 ppm.