激光质谱法:原理及其在环境监测中的应用

Laser Mass Spectrometry: Principles and Applications in Environmental Monitoring

本文介绍了一种微量气体分析的新方法－激光质谱法．详细阐述了这种方法的原理，即激光紫外吸收光谱与飞行时间质谱的双重组合，并介绍了该方法的特色．重点描述了激光质谱法在两个方面的应用，即汽车尾气以及垃圾焚烧炉排放物中污染物的探测．研究表明，激光质谱法是一种有效的环境监测方法，特别是它可作为剧毒物质二恶英（ＰＣＤＤ／ＰＣＤＦ）分析和检测的一种替代方法．

A new method for trace gases analysis-laser mass spectrometry is introduced in this paper. The principles and characteristics of the method are described in detail, i.e., the coupling of resonance enhanced multiphoton ionization (REMPI) with flight-of-time mass spectroscopy. Emphases are on two applications : detection and analysis of exhaust gases from vehicle engines and flue gases from waste incinerators. Laser masspectrometry is an effective method for environmental inspection, especially as an alternative method for toxic dioxin (PCDD/PCDF) analysis and detection.