大气与环境光学学报, 2008, 3 (5): 0363, 网络出版: 2010-05-21
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 lonization Mass Spectrometry
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 chemical ionization proton transfer reaction mass spectrometry volatile organic compounds on-line monitoring integrated emission standard of air pollutants
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 react;ion mass spectrometry,PTR-MS)装置的参数进行了优化和测量。利用高纯N2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。
Abstract
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 Pollutants”(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”.
李建权, 沈成银, 王玉杰, 王鸿梅, 韩海燕, 郑培超, 徐国华, 储焰南. 挥发性有机污染物实时在线化学电离质谱测量方法研究[J]. 大气与环境光学学报, 2008, 3(5): 0363. LI Jian-quan, SHEN Cheng-yin, WANG Yu-jie, WANG Hong-mei, HAN Hai-yan, ZHENG Pei-chao, XU Guo-hua, CHU Yan-nan. Study of On-line Organic Pollutants Measurement with Chemical lonization Mass Spectrometry[J]. Journal of Atmospheric and Environmental Optics, 2008, 3(5): 0363.