A microslot impactor for organic aerosol sampling

Date Published
10/1997
Publication Type
Journal Article
Authors
DOI
10.1016/S0021-8502(96)00484-3
Abstract

A microslot impactor has been designed with the objective of collecting large, concentrated samples suitable for chemical analysis of trace organic constituents. It employs a single slotted orifice per stage, with orifice widths as small as 0.1 mm. Using a relatively small pump (13 kg), five cutpoints from 0.1 to 3.5 um are obtained at a flow rate of 361 min-1 (6 x 10-4 m3s-1). The microslot impactor operates with incompressible flow and minimal pressure drops for the upper four stages, and sonic flow through the last (fifth) stage. Measured cutpoints for the incompressible flow stages are somewhat higher than predcited, with critical Stokes numbers corresponding to 10 to 30% greater than theory.

Journal
Journal of Aerosol Science
Volume
28
Year of Publication
1997
Issue
7
Number
7
Pagination
1283-1290
Organizations
Research Areas
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