Design and Calibration of A High Volume Cascade Impactor |
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| Authors: | R A Gussman A M Sacco N M McMahon |
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| Institution: | 1. BGI Incorporated , Waltham , Massachusetts , USA;2. Bolt Beranek and Newman, Inc. , Cambridge , Massachusetts , USA |
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| Abstract: | The purpose of this study was to develop an air sampling device capable of classifying large quantities of airborne particulate matter into discrete size fractions. Such frac-tionation will facilitate chemical analysis of the various particulate pollutants and thereby provide a more realistic assessment of the effects of particulate matter on human beings. A 30 cfm, 5 stage cascade impactor of the slit-type has been constructed and calibrated. The calibration aerosol consisted of six different sizes of monodispersed methylene blue produced with a spinning disc generator. The test aerosol sizes varied from 1.35 to 14 μm. The calibration was challenged with heterodispersed aerosols of methylene blue, Arizona road dust, and DOP. |
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