摘要
汽车排放的颗粒气溶胶和有害气体严重影响着大气环境和人们的健康。我们研制了一台能够在线监测气溶胶粒径分布和气体组成成分的气溶胶在线质谱仪。此仪器具有响应时间快,性能稳定,自动化程度高和移动性好等特点。仪器采用了软电离方式,避免了碎片离子峰的形成,便于对污染环境中挥发性有机物的解析。实验结果表明仪器对挥发性有机物的检测下限为25ppb量级,并能实时测量尾气中气溶胶的浓度,在工厂废气以及污染场所气溶胶的测定方面有广阔的应用前景。
The aerosol and toxic gas from automobile exhaust could .affect adversely ambient environment and people＇s health. A homemade miniature aerosol mass spectrometer was reported, which can rapidlymonitor gas composition and aerosol size distribution in vehicle exhaust. This instrument is portable, fast, steady and highly automatic. A VUV soft ionization source was adopted in the mass spectrometer, which can avoid the formation of fragment ions and analyze volatile organic compounds in ambient air without pre-separation. The automobile exhaust was analyzed using this instrument to examine real-time Volatile Organic Compounds （VOCs）, aerosol size distribution and concentration. The apparatus showed great potential application for real time monitoring the concentration of VOCs and ambient nanoaerosols from factory exhaust and waste incineration
出处
《现代科学仪器》
2009年第3期3-7,共5页
Modern Scientific Instruments
基金
中国科学院科研装备研制项目
863课题2005AA641020资助
关键词
气溶胶
挥发性有机物
质谱
汽车尾气
Aerosol
Volatile organic compounds
Mass spectrometry
Automobile exhaust
