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Main Title Assessment of Carbon Sampling Artifacts in the Improve, STN/CSN, and Search Networks.
Author J. G. Watson ; J. C. Chow ; L. W. A. Chen ; S. D. Kohl ; R. J. Tropp
CORP Author Desert Research Inst., Reno, NV. Div. of Atmospheric Sciences.; Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Year Published 2008
Stock Number PB2012-101127
Additional Subjects Air pollution monitoring ; Organic carbon ; Chemical analysis ; Sampling techniques ; Diesel exhaust ; Levoglucosan ; Filters ; Field tests ; National parks ; Seattle(Washington) ; Phoenix(Arizona) ; District of Columbia ; Tonto National Monument(Arizona) ; Dolly Sods Wilderness(West Virginia) ; Mount Rainier(Washington)
Library Call Number Additional Info Location Last
NTIS  PB2012-101127 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 121p
The goal of this study is to better understand the magnitude and nature of measured OC artifacts on field blanks (bQF) and quartz-fiber filters behind quartz-fiber front filters (QBQ) and to evaluate strategies to compensate for these artifacts. Specific objectives are: Compile existing databases of mass, elements, and ions, non-processed data for OC, EC, and thermal fractions, as well as laboratory, field, and trip blanks for collocated IMPROVE, STN/CSN, and/or SEARCH sites. Describe how blanks have been handled and used in each network. Compare the magnitudes of adsorbed organic vapors estimated by different methods and evaluate how well the applied methods compensate for these artifacts in the reported OC concentrations. Examine the influence of water-soluble organics as powders and in solution on the blank/backup filters and the quantification of OC and EC with the IMPROVE and STN/CSN thermal/optical protocols. Acquire information that can better relate carbon measurements from the IMPROVE and STN/CSN network.