Journal article
Performance of Passive Samplers Analyzed by Computer-Controlled Scanning Electron Microscopy to Measure PM10-2.5
Environmental science & technology, Vol.50(14), pp.7581-7589
07/19/2016
DOI: 10.1021/acs.est.6b01105
PMID: 27300163
Abstract
We report on the precision and accuracy of measuring PM10-2.5 and its components with particles collected by passive aerosol samplers and analyzed by computer-controlled scanning electron microscopy with energy dispersive X-ray spectroscopy. Passive samplers were deployed for week-long intervals in triplicate and colocated with a federal reference method sampler at three sites and for 5 weeks in summer 2009 and 5 weeks in winter 2010 in Cleveland, OH. The limit of detection of the passive method for PM10-2.5 determined from blank analysis was 2.8 μg m(-3). Overall precision expressed as root-mean-square coefficient of variation (CVRMS) improved with increasing concentrations (37% for all samples, n = 30; 19% for PM10-2.5 > 10 μg m(-3), n = 9; and 10% for PM10-2.5 > 15 μg m(-3), n = 4). The linear regression of PM10-2.5 measured passively on that measured with the reference sampler exhibited an intercept not statistically different than zero (p = 0.46) and a slope not statistically different from unity (p = 0.92). Triplicates with high CVs (CV > 40%, n = 5) were attributed to low particle counts (and mass concentrations), spurious counts attributed to salt particles, and Al-rich particles. This work provides important quantitative observations that can help guide future development and use of passive samplers for measuring atmospheric particulate matter.
Details
- Title: Subtitle
- Performance of Passive Samplers Analyzed by Computer-Controlled Scanning Electron Microscopy to Measure PM10-2.5
- Creators
- Thomas M Peters - The University of Iowa , Iowa City, Iowa 52242, United StatesEric J Sawvel - The University of Iowa , Iowa City, Iowa 52242, United StatesRobert Willis - U.S. EPA, Office of Research and Development, National Exposure Research Laboratory , Research Triangle Park, North Carolina 27709, United StatesRoger R West - RJ Lee Group, Inc., Monroeville, Pennsylvania 15146, United StatesGary S Casuccio - RJ Lee Group, Inc., Monroeville, Pennsylvania 15146, United States
- Resource Type
- Journal article
- Publication Details
- Environmental science & technology, Vol.50(14), pp.7581-7589
- Publisher
- United States
- DOI
- 10.1021/acs.est.6b01105
- PMID
- 27300163
- ISSN
- 0013-936X
- eISSN
- 1520-5851
- Grant note
- P30 ES005605 / NIEHS NIH HHS
- Language
- English
- Date published
- 07/19/2016
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Occupational and Environmental Health
- Record Identifier
- 9983997445302771
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