挥发性有机污染物实时在线化学电离质谱测量方法研究  

Study of On-line Organic Pollutants Measurement with Chemical Ionization Mass Spectrometry

作　　者：李建权[1,2] 沈成银[1,2] 王玉杰[1,2] 王鸿梅[1,2] 韩海燕[1,2] 郑培超[1,2] 徐国华[1,2] 储焰南[1,2] 

机构地区：[1]中国科学院安徽光学精密机械研究所环境光谱学实验室,安徽合肥230031 [2]中国科学院环境光学与技术重点实验室,安徽合肥230031

出　　处：《大气与环境光学学报》2008年第5期363-368,共6页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金(20577049);中国科学院仪器研制项目(Y2005015);安徽省优秀青年科技基金(06045098);合肥物质科学研究院院长基金

摘　　要：以《大气污染物综合排放标准))(GB 16297-1996)中有机物的实时在线测量为目的,对自行研制的质子转移反应质谱(proton transfer reaction mass spectrometry,PTR-MS)装置的参数进行了优化和测量。利用高纯N_2稀释的单一有机物PTR-MS测量结果表明,在E/N=144 Td条件下,质子化的有机物离子为主要的产物离子峰,没有明显的碎片离子存在。测试了进样系统中催化转化装置的性能,给出了11种挥发性有机物的探测灵敏度和检测下限,讨论了PTR-MS的测量精度。测试结果表明,自行研制的PTR-MS能够实时在线监测《大气污染物综合排放标准》中规定的有机污染物。Parameters of homemade proton transfer reaction mass spectrometry （PTR-MS） for on-line measurements of volatile organic compounds （VOCs） restricted in ＂Integrated Emission Standard of Air Pollurants＂ （GB 16297-1996 ） were optimized and measured. The individual VOCs in pure N2 were measured at E/N = 144 Td by PTR-MS and the results show that the main ions are the protonated compound and few fragmentations exist. The sensitivity and limitation of homemade PTR-MS was obtained to 11 VOCs. The efficiency of the catalytical converter in gas inlet was tested. The precision of the PTR-MS was discussed. The results show that the homemade PTR-MS is a simple and effective tool for real time monitoring the VOCs restricted in ＂Integrated Emission Standard of Air Pollutants＂.

关 键 词：化学电离 质子转移反应质谱 挥发性有机物 在线监测 大气污染物综合排放标准 

分 类 号：X831[环境科学与工程—环境工程]