利用激光电离技术进行大气压力下的环境苯系物的探测,是一种新的探测方法,它能快速、实时、在线测量环境中苯系物的浓度,并且设备简单,不需要复杂的真空系统,其探测灵敏度小于5 ppb,时间分辨率为4 s.该方法尤其适合机动车道边附近的测量.文中介绍了系统结构和主要参数,报道了该仪器在不同的交通状况下,探测大气环境中苯系物的一些结果,车流量大则污染严重,车流量小则污染轻.
参考文献
| [1] | Swenson O F, Carriere J P et al. Real-time monitoring of BTEX in air via ambient pressure MPI [C] // Proc.SPIE, 1998, 3270:216-225 |
| [2] | Gee I L, Sollars C J. Ambient air levels of volatile organic compounds in latin American and Asian cities [J].Chemosphere, 1998, 36(11): 2497-2506 |
| [3] | Weickhardt C, Boesl U, Schlag E W. Laser mass spectrometry for time-resolved multicomponent analysis of exhaust gas [J]. Anal. Chem., 1994, 66 (7): 1062-1069 |
| [4] | Boesl U, Nagel H, Weickhardt C et al. Vehicle Exhaust Emission Time-Resolved Multicomponent Analysis by Laser Mass Spectrometry [M]. The Encyclopedia of Environment Analysis and remediation, 1998, 5000-5020 |
| [5] | Skov H, Lindskog A et al. An overview of commonly used methods for measuring benzene in ambient air [J].Atmospheric Environment, 2001, 35S(1): S141-S148 |
| [6] | Frueholz R, Wessel J, Wheatley E. Resonance enhanced two-photon photoionization spectroscopy applied to detection of naphthalene vapor [J]. Anal. Chem., 1980, 52(2): 281-284 |
| [7] | Li Ziyao, Wei Jie et al. Laser mass spectrometry: principles and applications in environmental monitoring [J].Chinese Journal of Quantum Electronics(量子电子学报),2001,18(1):1-8(in Chinese) |
| [8] | Kong Xianghe, Zheng Haiyang et al. Mobile mass spectrometer and application to monitoring of vehicle exhaust gas[J].Chinese Journal of Atomic and Molecular Physics(原子分子物理学报),2001,18(3):273-277(in Chinese) |
| [9] | Wei Jie, Zhang Bing et al. Rapid analysis of trace pollutants using laser mass spectrometry [J]. Science in China (Series A), 2001, 31 (5): 474-480 |
| [10] | Gillispie G D, Klingfus J L et al. Real-time REMPI detection of benzene and toluene: a progress report [C]//Proc. SPIE, 2000. 3929:208-215 |
| [11] | Wei Jie, Fang Li et al. Analysis of multiphoton ionization process of diethylamine by mass spectra and rate equation [J].ChineseJournal of Chemical Physics(化学物理学报),1998,11(5):393-398(in Chinese) |
| [12] | Swenson O F, Gillispie G D. REMPI detection of volatile aromatic hydrocarbons in ambient air [C]//Proc. SPIE, 1996, 2835:144-152 |
| [13] | Ogawa T, Yasuda T. Laser two-photon ionization detection of aromatic molecules on a metal surface in ambient air [J]. Anal. Chem., 1992, 64(21): 2615-2617 |
| [14] | Inoue T, Masuda K et al. Highly sensitive detection of aromatic molecules by laser two-photon ionization on the surface of water in ambient air [J]. Anal. Chem., 1994, 66 (7): 1012-1014 |
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