不同场所室内空气中主要有机污染物的定性分析

利用大气采样罐对不同场所如居室、汽车、超市的室内空气进行采样,利用预浓缩器将气体样品冷聚焦,并去除水和CO2,然后自动将样品导入气相色谱质谱,分析其中的主要有机污染物。结果表明,室内、轿车和超市内的有机污染物主要为苯系物、卤代烃、烷烃和酮类,它们大部分来自板材、涂料、皮革和装饰物等。该方法采样快速简单,分析操作中不需使用任何有机试剂,实验背景干扰少,定性分析准确。

Analysis of Main Organic Pollutants in Indoor Environment in Different Sites

It is well known that organic compounds are the main pollutants in the atmosphere.In this work the atmospheric canister was used to sample different indoor air. Air sample was first frozen by liquid nitrogen,H_2O and CO_2 in the sample were eliminated in the VOCs preconcentrator,and then the preconcentrated sample was injected to gas chromatography and analyzed by mass detector.The results showed that main organic pollutants in the air in room,car and supermarket were BETXs,hologenate hydrocarbons,alkanenydrocarbons and ketones,which came from timber,coating,leather and ornaments etc.The sampling in this method were very simple and quick,and the organic solvent was never used during the analysis procedures.The result was accurate.