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在有机碳颗粒和PAH中消除正负取样工件,使用多吸收剂涂层和未涂层的脱皮剂

Ercan Berberler¹, Duran Karakaş²

¹Department of Environmental Engineering, Bolu Abant Izzet Baysal University, 14030, Bolu, Turkiye; Department of Environmental Engineering, Bartin University, Bartın, 74100, Turkiye.

|August 15, 2024

概括

新的PM2.5采样器减少了测量有机碳和多环芳的误差. 这些先进的采样器最大限度地减少了挥发性有机化合物和气相化合物的物质,从而改善了大气测量.

科学领域:

环境科学环境科学
分析化学分析化学
大气化学大气化学

背景情况:

颗粒物 (PM2.5) 取样可能会受到挥发性有机化合物 (VOC) 和气相多环芳 (PAH) 的影响,导致有机碳 (OC) 和PAH的测量不准确.
现有的采样方法可能会为OC和PAH度带来积极的人工物,原因是气态化合物吸附到过器上.

研究的目的:

设计和开发同等的PM2.5采样器,消除大气OC和PAH的采样工件.
量化与OC和PAH测量相关的错误,当在采样过程中不使用脱皮剂时.

主要方法:

开发两种同等的PM2.5采样器,其中包括除器,以捕获VOC和气相PAHs.
对脱皮器的质量损失分析,以评估其对采样效率的影响 (观察到<10%).
使用和不使用浸脱剂的OC和PAH测量的比较.

主要成果:

如果没有浸的脱毛剂,OC度被高估了平均53.2%±7.23%.
即使考虑到备份过器的负误差,OC总误差仍然为35.1%±16.8%.
总PAH测量结果显示,当不使用脱皮剂时,正误差为41.0%±14.6%. 对特定的PAHs来说,臭氧诱导的负面干扰是显著的.

结论:

开发的PM2.5采样器有效地减轻了OC和PAH测量采样工件.
准确量化大气中的OC和PAH需要使用排毒器来纠正VOC和气相PAH干扰.
该研究强调了在颗粒物分析中考虑正负两种错误的重要性.

关键词:

艺术品文物文物没有了,没有了,没有了.基本的碳元素是碳.对于PM2.5来说,这是一个很好的例子.有机碳颗粒物有机碳颗粒物

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