High-Volume Impactor for Sampling Fine and Coarse Particles

摘要

Final design, calibration, and field testing have been completed for a new 1.13cu m/min (40 cfm) High-Volume Virtual Impactor (HVVI). Field tests have demonstrated that the new classifier/collector works well as an accessory to the existing PM(sub 10). Size Selective Inlet high-volume samplers. The HVVI provides two fractions of PM(sub 10) mass, both of which are collected by filtration. The fine fraction (0-2.5 micrometer aero. dia.) is collected on the standard 20.3 x 25.4 cm (8-x 10-in) high-volume filter; the coarse fraction (2.5-10 micrometer