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A critical evaluation of interlaboratory data on total, elemental, and isotopic carbon in the carbonaceous particle reference material, NIST SRM 1649a

Show simple item record Currie, L. A. Benner, B. A. Kessler, J. D. Klinedinst, D. B. Klouda, G. A. Marolf, J. V. Slater, John F. Wise, S. A. Cachier, H. Cary, R. Chow, J. C. Watson, J. Druffel, E. R. M. Masiello, C. A. Eglinton, T. I. Pearson, A. Reddy, C. M. Gustafsson, O. Hartmann, P. C. Quinn, J. G. Hedges, J. I. Prentice, K. M. Kirchstetter, T. W. Novakov, T. Puxbaum, H. Schmid, H. 2010-09-17T12:42:08Z 2010-09-17T12:42:08Z 2002-05
dc.description.abstract Because of increased interest in the marine and atmospheric sciences in elemental carbon (EC), or black carbon (BC) or soot carbon (SC), and because of the difficulties in analyzing or even defining this pervasive component of particulate carbon, it has become quite important to have appropriate reference materials for intercomparison and quality control. The NIST "urban dust" Standard Reference Material? SRM 1649a is useful in this respect, in part because it comprises a considerable array of inorganic and organic species, and because it exhibits a large degree of (14C) isotopic heterogeneity, with biomass carbon source contributions ranging from about 2 % (essentially fossil aliphatic fraction) to about 32 % (polar fraction). A primary purpose of this report is to provide documentation for the new isotopic and chemical particulate carbon data for the most recent (31 Jan. 2001) SRM 1649a Certificate of Analysis. Supporting this is a critical review of underlying international intercomparison data and methodologies, provided by 18 teams of analytical experts from 11 institutions. Key results of the intercomparison are: (1) a new, Certified Value for total carbon (TC) in SRM 1649a; (2) 14C Reference Values for total carbon and a number of organic species, including for the first time 8 individual PAHs; and (3) elemental carbon (EC) Information Values derived from 13 analytical methods applied to this component. Results for elemental carbon, which comprised a special focus of the intercomparison, were quite diverse, reflecting the confounding of methodological-matrix artifacts, and methods that tended to probe more or less refractory regions of this universal, but ill-defined product of incomplete combustion. Availability of both chemical and 14C speciation data for SRM 1649a holds great promise for improved analytical insight through comparative analysis (e.g., fossil/ biomass partition in EC compared to PAH), and through application of the principle of isotopic mass balance. en_US
dc.format.extent 167128 bytes en_US
dc.language.iso en_US en_US
dc.publisher National Institute of Standards and Technology en_US
dc.relation.requires Adobe Acrobat Reader en_US
dc.rights Publisher retains all ownership rights. Further reproduction in violation of copyright is prohibited en_US
dc.subject.other elemental carbon en_US
dc.subject.other fossil and biomass carbon en_US
dc.subject.other international intercomparison en_US
dc.subject.other total carbon certified value en_US
dc.title A critical evaluation of interlaboratory data on total, elemental, and isotopic carbon in the carbonaceous particle reference material, NIST SRM 1649a en_US
dc.type Article en_US
dc.description.bibliographicCitation Carrie, L. A., Benner, B. A., Kessler, J. D., Klinedinst, D. B., Klouda, G. A., Marolf, J. V., . . . Schmid, H. (2002). A Critical Evaluation of Interlaboratory Data on Total, Elemental, and Isotopic Carbon in the Carbonaceous Particle Reference Material, NIST SRM 1649a. Journal of Research of the National Institute of Standards and Technology, 107(3), 279-298. en_US
dc.format.mediaType PDF en_US

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