The technology of automatic VOCs monitoring in surface water by gas chromatography is usually applied by automat-ic water quality monitoring stations, which can automatically actualize sample collection, pretreatment, detection, data statistical analysis and transmission. By using the monitoring system of CMS5000, concentrations of 18 kinds of VOCs in water were auto-matically monitored by the detecting method of purge and trap coupled with gas chromatography. The results show that the monito-ring method has good linear performance, low detection limit, high accuracy and preciseness, and it can meet the technical re-quirements for automatic monitoring. Moreover, random check on the surface water samples is conducted and no VOCs are detec-ted. In addition, some influencing factors to the technology of automatic VOCs monitoring in surface water are discussed.%地表水VOCs气相色谱自动监测技术主要应用于水质自动监测站，能够自动实现水样采集、预处理、检测，以及数据分析处理和传输等。借助CMS5000监测系统，并采用吹扫捕集/气相色谱法，对水中18种VOCs进行了自动监测。结果表明，该检测方法线性好、检出限低、准确度和精密度高，符合自动监测技术要求。随机对地表水进行自动监测，均未检出18种VOCs。此外，还针对地表水VOCs检测中存在的一些影响因素进行了探讨，为该自动监测技术更好地应用于水质自动监测站提供了经验参考。
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