Grantee Research Project Results
2004 Progress Report: Evaluation and Minimization of Organic Aerosol Sampling Artifacts Using Impactors and Quartz Fiber Filter Denuders
EPA Grant Number: R831087Title: Evaluation and Minimization of Organic Aerosol Sampling Artifacts Using Impactors and Quartz Fiber Filter Denuders
Investigators: Fitz, Dennis R.
Institution: University of California - Riverside
EPA Project Officer: Chung, Serena
Project Period: October 1, 2003 through October 31, 2007
Project Period Covered by this Report: October 1, 2003 through October 31, 2004
Project Amount: $187,030
RFA: Measurement, Modeling, and Analysis Methods for Airborne Carbonaceous Fine Particulate Matter (PM2.5) (2003) RFA Text | Recipients Lists
Research Category: Particulate Matter , Air Quality and Air Toxics , Air
Objective:
The overall objective of this research project is to provide an enhanced characterization of the magnitude and characteristics of particulate organic carbon (POC) measurement artifacts so that the contribution and source of POC to PM2.5 can be assessed with greater certainty. The goal is to execute a comprehensive sampling study that utilizes the best available and emerging technologies and strategies, resulting in a robust data set from which clear conclusions concerning sampling artifacts can be drawn.
Progress Summary:
A sampling system was built that could collect simultaneous PM2.5 samples using nine different collection strategies. Figure 1 shows a schematic of the system. Flow rates are monitored continually with pressure transducers that measure the pressure drop across 2 m of 3/8-inch OD polyethylene tubing. Rotameters also are used for a visual monitor of the flow rate. The target flow rate was 30 alpm, the rate required by the MOUDI™ cascade impactors. This rate was used for all sample trains so that the sampling flow rate would not be a variable in the collection process. Two Campbell CR10X data loggers are used to record flow rates, ambient temperature and pressure, and enclosure temperature. The sampler is turned on and off by a timer controlling the vacuum pumps (four pumps are used). Four sample sets were collected in Riverside, California, for analysis of organic and elemental carbon.
Future Activities:
We will collect and analyze additional samples for organic and elemental carbon content. The data will be analyzed with respect to collection artifacts, and a final report will be submitted.
Figure 1. Schematic Drawing of the Sampling System
Journal Articles:
No journal articles submitted with this report: View all 2 publications for this projectSupplemental Keywords:
particulate organic carbon, POC, OC, EC, sampling artifact, denuder, filter, ambient air, monitoring, measurement methods, adsorption, particulates, air, ecosystem protection/environmental exposure and risk, waste, air pollution effects, air quality, analytical chemistry, atmospheric sciences, engineering, chemistry, physics, environmental chemistry, environmental engineering, environmental monitoring, monitoring/modeling, air toxics, chemical mixtures, particulate matter, PM2.5, aerosol analyzers, aerosol particles, air modeling, air pollutants, air quality model, air quality modeling, air sampling, airborne particulate matter, atmospheric particles, atmospheric particulate matter, carbon aerosols, carbon particles, chemical characteristics, chemical speciation sampling, emissions, gas chromatography, health effects, impactors, mass spectrometry, measurement methods, modeling studies, particle dispersion, particle size, particle size measurement, particulate matter mass, quartz fiber filter denuders, thermal desorption,, RFA, Air, Scientific Discipline, Ecosystem Protection/Environmental Exposure & Risk, Waste, chemical mixtures, particulate matter, Air Quality, Environmental Chemistry, Engineering, Chemistry, & Physics, Monitoring/Modeling, Air Pollution Effects, Atmospheric Sciences, air toxics, Environmental Engineering, Environmental Monitoring, aerosol particles, health effects, particle size, air sampling, gas chromatography, mass spectrometry, carbon particles, emissions, chemical characteristics, air quality modeling, measurement methods, airborne particulate matter, atmospheric particles, quartz fiber filter denuders, modeling studies, thermal desorption, particulate matter mass, air quality model, particulate organic carbon, carbon aerosols, aerosol analyzers, air quality models, atmospheric particulate matter, impactors, ultrafine particulate matter, chemical speciation sampling, particle size measurement, air pollutants, particle dispersion, air modelingRelevant Websites:
http://www.cert.ucr.edu/research/publications.asp Exit
Progress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.