我国几种典型树种非甲烷烃类的排放特征

采用封闭式采样法和带有预浓缩及程序升温装置的熔融毛细管柱气相色谱仪，对我国的松、柏、杨、槐等几种典型树种排放非甲烷烃类（ＮＭＨＣ）的组成和排放速率进行了定性和定量测定，初步确定了不同树种和的特征物种和排放规律，结果表明，针叶树种和阔叶树种排放的ＮＭＨＣ组成差别很大，各树种的排放规律除了与自身的结构和生理活动等在内在因素有关外，还在不同程度上受到外界因素（主要是温度和光强）的影响，一般温度越高，光强

STUDY ON NMHC EMISSION CHARACTERISTICS OF SEVERAL TYPICAL TREES IN CHINA

NMHC emission characteristics of several typical trees in China such as pine (Pinus), cypress (Cupressus), poplar (Populus) and Chinese schoiartree (Sophora) have been studied using enclosure sampling technique and capillary gas chromatography with a cryogenic preconcentration. The results show that NMHC composition in emissions of conifers are quite different from those of deciduous foliages, and the emission rate of trees are affected by not only internal factors such as structure and metabolism but also environmental conditions, especially temperature and sunlight intensity. Generally, the emission rate increases with higher temperature and more light flux. Some difference of emission characteristics between biogenic and anthropogenic NMHC sources are also discussed in the paper.