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www.atmos-meas-tech-discuss.net/3/1743/2010/
doi:10.5194/amtd-3-1743-2010
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under the Creative Commons Attribution 3.0 License.
Towards the development of standard reference materials for soot measurements – Part 1: Tailored graphitized soot
1Moscow State University, Moscow, Russia
2Droplet Measurement Technologies, 80301 Boulder, CO, USA
3UNAM, Centro de Ciencias de la Atmosfera, Mexico City, Mexico
4Sunset Laboratories, 97223 Tigard, OR, USA
Abstract. The lack of standard reference materials for calibrating, troubleshooting and intercomparing instruments that measure the properties 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 combustion particles found in the atmosphere. The proposed soot reference material (SRM) uses elemental carbon as a basis substrate for surface coatings of organic compounds that are representative of 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.
Discussion Paper (PDF, 1670 KB) Interactive Discussion (Closed, 4 Comments) Final Revised Paper (AMT)
Notice on Discussion StatusCitation: Popovicheva, O., Subramanian, R., Baumgardner, D., Kok, G., Cary, R., Vlasenko, E., Khokhlova, T., Shonija, N., and Kireeva, E.: Towards the development of standard reference materials for soot measurements – Part 1: Tailored graphitized soot, Atmos. Meas. Tech. Discuss., 3, 1743-1773, doi:10.5194/amtd-3-1743-2010, 2010. Bibtex EndNote Reference Manager XML
