丹江口水库是南水北调中线工程的水源地，其水质优劣对工程效益有直接影响。长江流域水环境监测中心首次采用色———质联用仪，分别于１９９５年枯水期和丰水期，对丹江口水库水体中的微量有机污染物，进行了初步探查。基本掌握了丹江口水库微量有机物污染分布状况及库区主要污染物种，为库区及水源地的水污染控制与水资源保护及规划提供了极为重要的科学依据 Danjiangkou Reservoir is a water source for the mid-route of the South-to-North Water Diversion Project. The quality of its water has a direct impact on project benefits. The Yellow River Basin Water Environment Monitoring Center for the first time using the color --- mass spectrometer, respectively, in the dry season in 1995 and wet period, the Danjiangkou Reservoir trace organic pollutants, preliminary exploration. It basically grasps the distribution of trace organic pollutants in Danjiangkou Reservoir and the major pollutants in the reservoir area and provides an extremely important scientific basis for water pollution control and water resources protection and planning in the reservoir area and water source area