Abstract: Volatile organic compounds（VOCs）in air do great harm to human health. This paper reviews the progress in research on the on-line monitoring techniques for volatile organic compounds （VOCs）in recent years at home and abroad. Some on-line monitoring techniques，including membrane extraction gas chromatography，proton-transfer-reaction mass spectroscopy，time-of-flight mass spectrometry，Fourier transform infrared spectroscopy and laser spectroscopy are introduced and compared. The advantages and shortages of tunable diode laser absorption spectrometry are discussed，and the prospect of its application is also presented.

摘要： 综述了近年来国内外在空气中挥发性有机物在线监测技术上的研究进展，对膜萃取气相色谱、质子转移反应质谱、飞行时间质谱、傅里叶变换红外光谱以及激光光谱等在线监测技术进行了介绍和对比，重点讨论了可调谐激光吸收光谱在线监测技术的优势和不足，并对其发展前景进行了展望。