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PM 2.5 ORGANIC SPECIATION INTERCOMPARISON RESULTS
Citation:
MCDOW, S. R., M. M. SCHANTZ, S. A. WISE, AND J. JUNGERS. PM 2.5 ORGANIC SPECIATION INTERCOMPARISON RESULTS. Presented at International Aerosol Conference (AAAR/ISAM), St. Paul, MN, September 10 - 15, 2006.
Impact/Purpose:
The goal of this task is to develop methods and models to reduce the uncertainty in quantifying local and regional air pollutant source impacts on ambient samples collected in speciated PM, air toxic, and semi-continuous measurement networks. A combination of high resolution sampling, organic and inorganic analytical methods, and models will be developed and evaluated to reduce the uncertainty in source apportionment:
(1) semi-continuous inorganic species sampling
(2) inorganic analysis
(3) organic analysis for medium flow samples
(4) multivariate receptor models for ambient samples
(5) regional and local models
In addition, this task contributes to two additional tasks that have research focused on reducing the uncertainty in source apportionment: Identify Sources of Human Exposure (21176), and NAAQS implementation (21179).
Description:
This abstract describes a poster on results to a laboratory intercomparison of organic aerosol speciation analysis to be presented at the 2006 International Aerosol Conference sponsored by the American Association for Aerosol Research in St. Paul, Minnesota on September 10-15. Three interlaboratory trials were conducted and good agreement was observed in all trials for polycyclic aromatic hydrocarbons (PAH's) and nitro-substituted PAH's. Agreement between laboratories for other organic species, including alkanes, hopanes, and pyrolyzed sugars, was not clearly demonstrated. New standard reference materials were introduced in hopes of obtaining better agreement for these species.