气相色谱／质谱法研究光照对气态偏二甲肼氧化行为的影响

摘要

通过搭建环境模拟实验系统，研究不同光照条件下气态偏二甲肼的氧化行为。气相色谱－质谱测定结果显示，无光条件下气态偏二甲肼会氧化生成二甲胺、偏腙、亚硝基二甲胺、二甲基胺乙腈、乙醛二甲基腙一系列产物。光照条件下，偏二甲肼的氧化速度加快；随着光照增强，检测出新的氧化产物四甲基四氮烯、四甲基肼、硝基二甲胺、二甲基甲酰胺；强光条件下，亚硝基二甲胺含量明显降低。%By building environment simulation laboratory modules,we researched oxidation behavior of gaseous unsymmetrical dimethylhydrazine (UDMH)under different light conditions.The results of gas chromatography-mass spectrometry (GC-MS )showed that the absence of UDMH to air oxidation could product a range of dimethylamine,partial hydrazone,nitroso dimethylamine,dimethylamine acetonitrile, acetaldehyde dimethyl hydrazone.In the light conditions,the rate of oxidation of UDMH accelerated.With the enhancement of light,new oxidation products tetramethyl tetrazene,tetramethyl hydrazine,nitro dimethylamine, dimethyl formamide were detected. In bright light conditions, NDMA decreased significantly.