GC及GC/MS分析大气中气相有机污染物
ANALYSIS OF ORGANIC GASEOUS POLLUTANTS IN ATMOSPHERE USING GC AND GC-MS
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摘要: 采用毛细管气相色谱法及毛细管气相色谱-质谱法,结合低温吸附、冷凝浓缩等技术测定了大气中气相有机污染物。本法以液氮为致冷剂,高分子微球GDX-102为吸附剂,铜毛细管为浓缩管,可测定大气中ppb级的气相有机物,准确发能满足环境样品的分析要求。讨论了大气气相有机物的浓缩条件以及样品的定性和定量分析,并利用此法测定了长春市某交通要道的大气气相有机污染物。Abstract: Analysis of organic gaseous pollutants in atmosphere has been studied by capillary GC and GC-MS methods combined with concentration technique of double freezing and absorbtion.The first cryogenic trap immersed in liquid nitrogen contained the porous polymer beads of GDX-102. The second cryogenic trap immersed in liquid nitrogen was a copper capillary column. The optimum condition of the experiments and qualitative-quantitative analysis of the air samples were discussed. The sensitivity of this technique is ppb level.The organic gaseous pollutants in atmosphere of a traffic crossing in Changchun city were determined by this method.
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