Effective density of Aquadag and fullerene soot black carbon reference materials used for SP2 calibration

By Martin Gysel, M. Laborde, J. Olfert, R. Subramanian, A. Gröhn. 2011

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Abstract. The mass and effective density of black carbon (BC) particles generated from aqueous suspensions of Aquadag and fullerene soot was measured and parametrized as a function of their mobility diameter. The measurements were made by two independent research groups by operating a differential mobility analyser (DMA) in series with an aerosol particle mass analyser (APM) or a Couette centrifugal particle mass analyser (CPMA). Consistent and reproducible results were found in this study for different production lots of Aquadag, indicating that the effective density of these particles is a stable quantity and largely unaffected by differences in aerosol generation procedures and suspension treatments. The effective density of fullerene soot particles from one production lot was also found to be stable and independent of suspension treatments. Some differences to previous literature data were observed for both Aquadag and fullerene soot at larger particle diameters. Knowledge of the exact relationship between mobility diameter and particle mass is of great importance, as DMAs are commonly used to size-select particles from BC reference materials for calibration of single particle soot photometers (SP2), which quantitatively detect the BC mass in single particles.

Subfields: Atmospheric Science, Health, Toxicology and Mutagenesis

View Paper: https://www.semanticscholar.org/paper/ed5530e13d56c91b54e33196195af9566d9da500

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In Atmospheric Science

In Health, Toxicology and Mutagenesis

Citations in the corpus

Single Particle Soot Photometer intercomparison at the AIDA chamber (2012, methodology): “13 are based on size-selected particles, and the corresponding particle mass was calculated from the mobility diameter using the effective density data reported in Gysel et al. (2011).”