|关键词: 挥发性有机物 动态稀释法 气相色谱/质谱联用法 固定污染源 汽车涂装行业
|Application of Dynamic Dilution Method in Determination of Volatile Organic Compounds in Stationary Sources of Automobile Coating Industry
Shanghai Baoshan District Enviromental Monitoring Station, Shanghai, 201901, China
|This paper introduces the main sampling methods of VOCs in stationary source, and focuses on the introduction of sampling method with dynamic dilution. Stack gas was sampled in the exhaust emission inlet of the coating workshop of an automobile enterprise by the dynamic dilution method. Qualitative analysis and quantitative analysis of 10 VOCs were carried out. The stability of the method was studied, the RSD range of 10 VOCs was from 9% to 32%, meeting the range of operating conditions. Different sampling time and different adsorption tubes were also studied, the analysis results were compared to the results of the automatic online monitoring, showing the results with dynamic dilution method were in the range of actual operating conditions. So the dynamic dilution method can be satisfied with the sampling of VOCs in automobile coating industry.
|Key words: VOCs Dynamic dilution method Gas chromatography/mass spectrometry Stationary source Automobile coating industry