This paper applies COPERT, a vehicular pollutant emission factor model, to calculate the emission factors of CO, CO₂ , NO_x , PM₂ , NMVOC, SO₂ , N₂ O, CH₄ , and NH₃ , for various vehicle categories including gasoline passenger cars, diesel passenger cars, LPG passenger cars, gasoline hybrid passenger cars, gasoline light duty vehicles, diesel light dutyvehicles, gasoline heavy duty vehicles, diesel heavy duty vehicles, buses, CNG buses, biodiesel buses, and motorcycles with different emission standards of Euro 0, Euro Ⅰ, Euro Ⅱ, Euro Ⅲ, Euro Ⅳ, Euro Ⅴ, and Euro Ⅵ, in consideration of factors including driving conditions, oil quality, and ambient temperature which have an impact on vehicular emission factors. The results provide scientific evidence and data support for the estimation of recent and future vehicular emission inventories in China, for the improvement of decision-making and management of vehicular pollution control, and for the assessment of the implementation effect of vehicular pollution control policies and measures.

Based on the principle of fair allocation, the five fundamental influencing factors affecting the allocation of the total air pollutant emissions were put forward. They were the status of emission sources，the environmental behavior of emission-generating enterprises，the economic contribution of emission sources to regional or city economy，the environmental impact of emission sources and their location, respectively. Then the influencing factors implied by current allocation methods were analyzed, followed by the evaluation of the fairness, rationality and applicability of the existing allocation methods. Results showe that there has been no method considering all these influencing factors so far, and the fairness of the existing methods is relative under the definite historical conditions. Therefore the appropriate allocation methods for local regions should be chosen according to different levels of economic development and requests for environmental management. Hence, suggestions for how to choose suitable methods for different economic regions to control air pollutant emissions were put forward.

Based on various allocation principle, allocation methods of the total amount for the atmosphere pollutants of point source in cities were divided into several categories: uniform proportion abatement, allocation according to the target of environmental quality, allocation based on certain benchmark, allocation based on economic index, and optimal means. The paper summarized the basic principle and application condition of various allocation methods, and pointed out the advantage,disadvantage and suitable area of methods.

The inorganic ions (fluoride, chloride, nitrate, sulfate, calcium, ammonium, sodium, magnesium, potassium) in aerosol samples were analyzed by capillary electrophoresis (CE) and ion chromatography (IC). The results showed that the correlation between the peak area and concentrations was good. The linear range and repeatability can meet the need of general aerosol samples measurement. The aerosol samples collected in Beijing were quantitatively analyzed with this method. The concentrations obtained by CE have a good agreement with those by ion chromatography (IC). Ｔ-test showed that there is no notable difference between the concentrations determined by the two methods.