| 摘要: |
| 介绍了固定污染源中挥发性有机物(VOCs)的主要采样方法，并重点介绍了动态稀释法在固定污染源中采样的应用。采用动态稀释法取样，对某汽车企业涂装车间的排放废气进行了定性分析，并对其中主要的10种VOCs进行了定量分析。研究了方法测定的稳定性，10种化合物相对标准偏差为9%~32%，符合工况变动范围。将不同采样时间及不同吸附材料的测定结果与在线监控数据进行比较，结果显示动态稀释法的测定结果均在实际工况波动范围内，说明该方法能够较好地满足汽车涂装行业VOCs的采样要求。 |
| 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 |
| DOI： |
| 分类号:O657.7+1；X831 |
| 文献标识码:B |
| 基金项目: |
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| Application of Dynamic Dilution Method in Determination of Volatile Organic Compounds in Stationary Sources of Automobile Coating Industry |
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YAN Jingfen
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Shanghai Baoshan District Enviromental Monitoring Station, Shanghai, 201901, China
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| Abstract: |
| 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 |
