AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Particle Losses with a Large Diamater Nafion Air Sample Dryer
Alfred Wiedensohler, EUGENE BOHENSKY, Paul Smith, Craig Sunada, Perma Pure LLC
Abstract Number: 614 Working Group: Instrumentation and Methods
Abstract Controlling relative humidity of an ambient aerosol sample flow is critical to obtain consistent results for physical and optical aerosol particle measurements. Gas sample dryers using Nafion membrane technology have been shown to control the relative humidity well in many analysis applications. However, especially bundle dryer used for higher flow rates might have enhanced particle losses due to diffusion. In this development, particle losses are characterized for Nafion dryers with large diameter membrane, which can be employed for a wide range of flow rates. Users and researchers performing aerosol research and analysis will have an effective option to control humidity while improving measurement accuracy and limiting particle losses.