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  Performance Characterization of the MiniVol™ PM2.5 Sampler
Jason S. Hill, Prateek D. Patel, and Jay R. Turner
Department of Chemical Engineering
Washington University, St. Louis, MO

Presented at the 92nd Annual AWMA Meeting, June 20-24, 1999

Abstract
Measurements were conducted to assess the MiniVol™ PM2.5 sampler performance for various particle preseparator configurations including flat and cup impaction stages. Laboratory measurements were conducted to determine the impactor collection efficiency as a function of paricle size. Impactor cut points - the aerodynamic particle diameter exhibiting 50% collection efficiency - were 2.5 um (+- 10%) for the flat stage and 3.0 um for the cup stage. Collection efficiency curves for cascade (tandem) impactor configurations (PM10 followed by PM2.5) generally agreed with the single stage results. In all cases the collection efficiency curves exhibited the classical sigmoidal shape, albeit less steep than required for PM2.5 Federal Reference Method (FRM) samplers. Field data was collected at urban sites in St. louis using MiniVol™ samplers collocated wiht a PM2.5 FRM sampler to quantify the MiniVol™ sampler precision and accuracy. Collocated sampler precision was 6% and 10% for MiniVol™ cascade impactors with flat PM2.5 stages and cup PM2.5 stages, respectively (N=31). Both of these MiniVol™ configurations were deemed statistically equivalent to the FRM when the reported ambient mass concentrations were corrected for field blank values (N=15).

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  Section Index  
   
Performance Characterization of the MiniVol PM2.5 Sampler
Long-Term Efficiencies of Dust Suppressants to Reduce PM10 Emissions from Unpaved Roads
EPA Saturation Monitor Repository
Oakridge, Oregon, 1994 PM10 Saturation Monitoring Study
Philadelphia Diesel Particulate Monitoring Study
Use of PM10 Monitoring Data to Evaluate the Effectiveness of the Dust Control Program During the Construction of the Central Artery Tunnel Project
Study of Particulate at Roadside Micro-environments in Selected Heavily Trafficked Districts in Hong Kong
Street-level Concentrations of Nitrogen Dioxide and Suspended Particulate Matter in Hong Kong
1993 Carbon Monoxide Saturation Study in Boston
Chemical Characterization of Particles in Winter-Nighttime Aerosol Smog in Tokyo
Ambient PM2.5, PM10, and Lead Measurements in Cairo, Egypt
Metropolitan St. Louis PM2.5 Saturation Monitoring Study
Results of an Extensive Multi-year PM10 Monitoring and Field Inspection Program for the Construction of the Central Artery/Tunnel Project
Portable Pm10 Monitoring For A Large Roadway Tunnel Project
Air Quality Assessment Techniques for Roadway Tunnel Projects

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