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| Titel |
Tailored graphitized soot as reference material for EC/OC measurement validation |
| VerfasserIn |
O. Popovicheva, D. Baumgardner, R. Subramanian, G. Kok, R. Cary, E. Vlasenko, T. Khokhlova, N. Shonija, E. Kireeva |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 4, no. 5 ; Nr. 4, no. 5 (2011-05-20), S.923-932 |
| Datensatznummer |
250001984
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| Publikation (Nr.) |
 copernicus.org/amt-4-923-2011.pdf |
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| Zusammenfassung |
| The lack of standard reference materials for calibrating, troubleshooting and
intercomparing techniques that measure the composition of black carbon,
commonly referred to as soot, has been a major obstacle that hinders improved
understanding of how climate and health is impacted by this ubiquitous
component of the atmosphere. A different approach is offered here as a means
of constructing precisely controlled material with fractions of organic
carbon (OC) on the surface of elemental carbon (EC) whose structure reflects
that of the combustion produced particles found in the atmosphere. The
proposed soot reference material (SRM) uses EC as a basis substrate for
surface coatings of organic compounds that are representative of the main
classes of organics identified in the coverage of soot produced by fossil
fuel burning. A number of methods are used to demonstrate the quality and
stability of the reference EC and SRM. Comparison of the nominal fraction of
OC deposited on the EC substrate with the fraction measured with
thermal/optical analysis (TOA) shows excellent agreement. Application of this
type of reference material for evaluating the different methods of carbon
analysis may help resolve differences that currently exist between comparable
measurement techniques when trying to separate OC and EC from ambient
samples. |
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