区域大气污染物源排放化学成分谱对识别区域大气污染来源和开展区域大气污染控制有非常重要的意义。针对关中平原城市群区域对挥发性有机物（VOCs）和含氧挥发性有机物（OVOCs）排放源成分谱迫切的科学和现实需求，基于隧道实验，建立柴油车、汽油车和压缩天然气车等移动排放源的VOCs和OVOCs成分谱；基于烟道和现场实验，建立重点工业固定源和重要散逸源的VOCs和OVOCs成分谱；获得各类污染源VOCs和OVOCs排放特征、暴露高风险组分和关键活性组分；计算关中平原城市群VOCs和OVOCs源排放清单；利用集成的排放源成分谱和环境大气样品，综合对比分析化学质量平衡模式（CMB）和正矩阵因子法模式（PMF）结果，定量解析关中平原城市群环境大气中VOCs和OVOCs主要来源；提出VOCs和OVOCs污染物和污染源优先控制名单，为改善空气质量提供可行的解决方案。

Knowledge on chemical profiles of pollution sources is essential for source apportionment and regional pollution control. The current study about the chemical profiles of volatile organic compounds (VOCs) and oxygenated volatile organic compounds (OVOCs) from emission sources is becoming impending demand in view of science and reality in Guanzhong Plain urban cluster. The objectives of the current study are 1) to develop chemical profiles of VOCs and OVOCs from mobile sources such as gasoline-fueled, diesel-fueled, and compressed natural gas (CNG)-fueled vehicles by tunnel study; 2) to develop chemical profiles of VOCs and OVOCs from stationary sources (industries) and fugitive sources; 3) to obtain chemical characterization of VOCs and OVOCs from emission sources, compounds causing high exposure risk, reactive compounds, and emission inventories; 4) to apportion source contributions by Chemical Mass Balance model (CMB) and Positive Matrix Factorization model (PMF); 5) to provide priority control lists of pollutants and emission sources for the air quality control policy in Guanzhong Plain urban cluster.