中文摘要：

质子转移反应质谱是近年来兴起的一种痕量挥发性有机物在线检测技术,它可以在秒量级的时间内获得ppt量级的探测灵敏度,已经广泛应用在环境污染监测、医学诊断、食品成分和质量检验等领域。本文介绍了它的工作原理和装置结构,给出了痕量挥发性有机物检测的典型例子,以及作者实验室使用该技术检测挥发性有机物的初步研究结果,并对该在线检测技术的发展方向进行了展望。

英文摘要：

Proton transfer reaction mass spectrometry （PTR-MS） is a new online monitoring technique for detecting trace volatile organic compounds. It has detection sensitivity up to ppt order of magnitude in the response time of seconds. PTR-MS has wide applications in various fields such as environmental pollution monitoring, medical diagnosis and food quality inspection. In this paper, the principle and apparatus of PTR-MS are introduced, Some typical examples for its applications as well as the preliminary experimental results on the PTR-MS in author＇s laboratory are given. The further developments in PTR-MS are discussed.