Use of a versatile high efficiency multiparallel denuder for the sampling of PAHs in ambient air: gas and particle phase concentrations, particle size distribution and artifact formation.
Use of a versatile high efficiency multiparallel denuder for the sampling of PAHs in ambient air: gas and particle phase concentrations, particle size distribution and artifact formation.
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DOI：
10.1021/es402937d
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发表时间：
2014
影响因子：
11.4
通讯作者：
J. Delgado-Saborit;C. Stark;R. Harrison
中科院分区：
文献类型：
--
作者：
J. Delgado-Saborit;C. Stark;R. Harrison
介绍了一种多平行板扩散器的设计和性能，该扩散器可在低流量和高流量（3-30 L/min）下工作，用于收集多环芳烃（PAH）蒸气。扩散管，结合微孔均匀存款冲击器（MOUDI）被用来评估过程中的伪影形成的MOUDI使用和不使用上游扩散管。具有上游扩散管的重复采样列显示出测量的气体和颗粒相浓度的良好重复性和扩散管中的低穿透（3.5-15%）。研究了未裸露和裸露MOUDI中PAH的粒径分布。使用的剥蚀器改变了测量的多环芳烃的尺寸分布朝向更小的尺寸，但裸露和未裸露的系统都受到采样文物。
The design and performance of a multiparallel plate denuder able to operate at low and high-flow (3-30 L/min) for the collection of polycyclic aromatic hydrocarbon (PAH) vapor is described. The denuder, in combination with a micro orifice uniform deposit impactor (MOUDI) was used to assess processes of artifact formation in MOUDIs used with and without an upstream denuder. Duplicate sampling trains with an upstream denuder showed good repeatability of the measured gas and particle-phase concentrations and low breakthrough in the denuder (3.5-15%). The PAH size distributions within undenuded and denuded MOUDIs were studied. Use of the denuder altered the measured size distribution of PAHs toward smaller sizes, but both denuded and undenuded systems are subject to sampling artifacts.