de Gouw Joost, Warneke Carsten
Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado 80305, USA.
Mass Spectrom Rev. 2007 Mar-Apr;26(2):223-57. doi: 10.1002/mas.20119.
Proton-transfer-reaction mass spectrometry (PTR-MS) allows real-time measurements of volatile organic compounds (VOCs) in air with a high sensitivity and a fast time response. The use of PTR-MS in atmospheric research has expanded rapidly in recent years, and much has been learned about the instrument response and specificity of the technique in the analysis of air from different regions of the atmosphere. This paper aims to review the progress that has been made. The theory of operation is described and allows the response of the instrument to be described for different operating conditions. More accurate determinations of the instrument response involve calibrations using standard mixtures, and some results are shown. Much has been learned about the specificity of PTR-MS from inter-comparison studies as well the coupling of PTR-MS with a gas chromatographic interface. The literature on this issue is reviewed and summarized for many VOCs of atmospheric interest. Some highlights of airborne measurements by PTR-MS are presented, including the results obtained in fresh and aged forest-fire and urban plumes. Finally, the recent work that is focused on improving the technique is discussed.
质子转移反应质谱法（PTR-MS）能够对空气中的挥发性有机化合物（VOCs）进行高灵敏度、快速响应的实时测量。近年来，PTR-MS在大气研究中的应用迅速扩展，人们对该技术在分析大气不同区域空气时的仪器响应和特异性有了很多了解。本文旨在回顾已取得的进展。文中描述了其工作原理，并针对不同操作条件描述了仪器的响应。更准确地确定仪器响应需要使用标准混合物进行校准，并展示了一些结果。通过相互比较研究以及PTR-MS与气相色谱接口的联用，人们对PTR-MS的特异性有了很多了解。本文对该问题的相关文献进行了综述和总结，涉及许多大气中感兴趣的VOCs。文中介绍了PTR-MS机载测量的一些亮点，包括在新鲜和老化的森林火灾及城市羽流中获得的结果。最后，讨论了近期致力于改进该技术的工作。
