Articles | Volume 12, issue 7
https://doi.org/10.5194/amt-12-3503-2019
https://doi.org/10.5194/amt-12-3503-2019
Research article
 | 
02 Jul 2019
Research article |  | 02 Jul 2019

Structural changes of CAST soot during a thermal–optical measurement protocol

Theresa Haller, Christian Rentenberger, Jannik C. Meyer, Laura Felgitsch, Hinrich Grothe, and Regina Hitzenberger

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Cited articles

Adachi, K. and Buseck, P. R.: Changes of ns-soot mixing states and shapes in an urban area during CalNex, J. Geophys. Res., 9, 3723–3730, https://doi.org/10.1002/jgrd.50321, 2013. 
Adachi, K., Chung, S. H., and Buseck, P. R.: Shapes of soot aerosol particles and implications for their effects on climate, J. Geophys. Res., D15, 6469, https://doi.org/10.1029/2009JD012868, 2010. 
Anderson, J. O., Thundiyil, J. G., and Stolbach, A.: Clearing the air. A review of the effects of particulate matter air pollution on human health, J. Med. Toxicol., 2, 166–175, https://doi.org/10.1007/s13181-011-0203-1, 2012. 
Andreae, M. O. and Gelencsér, A.: Black carbon or brown carbon? The nature of light-absorbing carbonaceous aerosols, Atmos. Chem. Phys., 6, 3131–3148, https://doi.org/10.5194/acp-6-3131-2006, 2006. 
Arnott, W. P., Moosmüller, H., Fred Rogers, C., Jin, T., and Bruch, R.: Photoacoustic spectrometer for measuring light absorption by aerosol. Instrument description, Atmos. Environ., 17, 2845–2852, https://doi.org/10.1016/S1352-2310(98)00361-6, 1999. 
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Short summary
In thermal–optical measurement techniques – widely used techniques to separate organic and elemental carbon – a filter sample is heated stepwise first in He and then in He+O2. Pyrolysis of organic material occurring during heating in He influences the results but is not fully understood. In this study, structural changes of carbonaceous material during a thermal–optical heating procedure are analyzed with Raman spectroscopy, TEM, UV–VIS and the integrating-sphere method.