%0 Journal Article %T Performance Evaluation of a Virtual Impactor with an Additional Pretreatment Structure for Particle Separation %A Wang, Pan %A Yuan, Shouqi %A Yang, Ning %A Wang, Aiying %J Aerosol and Air Quality Research %V 21 %N 4 %@ 1680-8584 %D 2021-04-01 %I Springer International Publishing %~ DeepDyve