摘要
对大同市空气中的多环芳烃类化合物进行了定性定量分析,用 GC/MS 和 HPLC 方法鉴定出气相中的主要多环芳烃类化合物17种,颗粒物上54种。其中有很多是多环芳烃的甲基化合物。在两个年度中对空气中苯并(a)芘的定量监测显示:1994年6月空气中苯并(a)芘的浓度显著高于1992年9月的浓度;1994年12月的测定值显然高于1992年11月的测定值,说明大同市空气中多环芳烃的污染有日渐加重的趋势。
Oualitative and quantitative analysis was conducted on the polynuclear aromatic com- pounds in the ambient air in the urban area of Datong city.17 polynuclear aromatic hydro- carbons in the gas phase and up to 54 PAHs on particulates in the atmosphere were identi- fied with GC/MS and HPLC techniques,and many of them were methylated polynuclear aromatic hydrocarbons.The data on quantitative monitoring of airborne benzo(a)pyrene in two different years revealed that the ambient concentration of benzo(a)pyrene determined in June,1994 was higher than that in September,1992 and the concentration of benzo(a) pyrene determined in December,1994 was higher than the corresponding value in Novem- ber,1992.These facts seem to indicate a tendency of evergrowing pollution of the ambient atmosphere by polynuclear hydrocarbons.
基金
国家自然科学基金
大同市环保局资助项目
