中文摘要：

2008年秋季在广州城区及其下风向沿海乡村地区采用活性炭吸附管采集大气挥发性有机化合物（VOC）,应用二次热解吸-GC/MS联用技术测量56种VOC的大气浓度,研究在典型海陆风条件下VOC的组成特征和日变化规律,并采用臭氧最大增量及OH自由基反应活性两种方法估算了该地区各VOC的臭氧生成潜力,探讨了VOC优先控制物种及来源。结果表明,陆风有利于广州城区空气污染物扩散,城区高浓度VOC污染物被输送到沿海乡村地区,导致新垦大气VOC浓度升高;海风有利于改善新垦的空气质量,但不利于城区空气污染物扩散,造成广州城区的大气VOC浓度显著上升。广州城区大气各类VOC的臭氧生成潜势表现为烯烃〉烷烃〉芳香烃〉OVOC,而新垦的臭氧生成潜势表现为烯烃〉烷烃〉OVOC〉芳香烃。广州地区大气中较活泼的VOC物种为C4、C5烯烃和烷烃以及苯系物,主要来源于机动车的排放。

英文摘要：

In the autumn of 2008,air samples were collected for volatile organic compounds（VOC） by activated carbon sorbent tubes from urban Guangzhou and rural seaside area in the downwind.56 VOC targets were detected by two-phase thermal desorption jointed with gas chromatography and mass spectrum（GC/MS） instrument to study the diurnal VOC variation during the local typical sea-land breeze.Then both maximum incremental reactivity（MIR） and OH radical reactivity were used to estimate the VOC ozone formation potential in order to discover the key VOC species and their emission sources which should be reduced firstly in Guangzhou.Results showed that heavy air pollutants in urban Guangzhou were diffused and transferred to the rural area by the land-breeze resulting in a remarkable increase of the VOC concentration in Xinken.However,the air quality of Xinken would be improved by the sea-breeze while causing the air pollution worse in urban Guangzhou.The ozone formation potential calculation by the speciated VOC appeared as alkenealkanearomaticsoxygen-containing VOCs in Guangzhou while alkenealkaneoxygen-containing VOCsaromatics in Xinken.The reactive VOC species mainly included C4 and C5 olefins and aromatics that attributed by the motor vehicle exhausts in Guangzhou.