研究论文
王少彬,唐孝炎.北京地区大气中卤代烃含量的初步测定[J].环境科学学报,1993,13(2):127-134
北京地区大气中卤代烃含量的初步测定
- A PRELIMINARY STUDY ON MEASUREMENT OF ATMOSPHERIC HALOCARBONS OVER BEIJING
- 摘要:研究了用电子捕获检测器测定大气中多种卤代烃化合物的气相色谱方法.选择的色谱分离柱有气液色谱柱25%DC-200 Chromosorb WAW DCMS(60-80目)和气固色谱柱carbopack CHT(80-100目).在等温条件下,以直接采样和直接进样方式分别测定了大气中多种卤代烃成份,并且比较了两根色谱柱的分析结果间的差异.在北京地区初步测定了主要的卤代烃如CFC-11,CFC-12,CHCl3,CH3CCl3,CCl4,CHCl=CCl2和CCl2=CCl2的含量,其各自相应的浓度分别是127±24,275±12,49±32,80±27,60±18,8±2和30±17ppt(V/V).
- Abstract:GC-ECD with gas-liquid or gas-solid column was used to determine the concentrations of halocarbons over Beijing and the measured concentrations of CFC-11, CFC-12,CHC13 ,CH3C13 ,CC14,CHC1 = CCl2 ,CCl2 = CCl2 were 127 ± 24, 275 ±12, 49 ±32, 80 ±27, 60±18, 8 ±2, 30±17(pptV), respectively.
摘要点击次数: 1709 全文下载次数: 2506