You are here:
SEMI-VOLATILE SECONDARY AEROSOLS IN URBAN ATMOSPHERES: MEETING A MEASURED CHALLENGE
Citation:
WILSON, W. E., B. D. GROVER, N. L. EATOUGH, D. J. EATOUGH, AND R. W. LONG. SEMI-VOLATILE SECONDARY AEROSOLS IN URBAN ATMOSPHERES: MEETING A MEASURED CHALLENGE. Presented at American Association of Aerosol Research 2005, Atlanta, GA, February 07 - 11, 2005.
Impact/Purpose:
1. Provide the Agency with semi-continuous and real-time instrumentation for its monitoring of ozone, ozone precursors, and reaction products of ozone formation.
2. Provide the Agency with semi-continuous and real-time instrumentation for its monitoring of water-soluble PM components and water-soluble atmospheric gases.
Description:
This presentation compares the results from various particle measurement methods as they relate to semi-volatile secondary aerosols in urban atmospheres. The methods include the PM2.5 Federal Reference Method; Particle Concentrator - BYU Organic Sampling System (PC-BOSS); the Real-time Ambient Mass Sampler (RAMS); the FDMS TEOM, and the GRIMM monitor. Total concentrations of PM2.5 including semi-volatile species can be measured with the PC-BOSS, RAMS and FDMS. The GRIMM monitor also measures SVM but appears to respond to particle bound water. The FRM can overestimate or underestimate PM2.5 mass depending on meteorological conditions. The TEOM monitor does not accurately determine total particulate matter due to loss of semi-volatile mass.
Although this work was reviewed by EPA and approved for presentation, it may not necessarily reflect official Agency policy