Elizabeth A. Stone

Elizabeth Stone
Assistant Professor
W376 CB
  • B.A., Grinnell College (2005)
  • Ph.D., University of Wisconsin-Madison (2009)

Environmental, organic, and analytical chemistry; emphasis placed on understanding molecular composition, transformation, and sources of atmospheric aerosols; laboratory and field studies; gas and liquid chromatography; mass spectrometry; source apportionment.

Research Interests: 

Research in the Stone group focuses on the chemical composition solid/liquid particles in the atmosphere, called aerosols. Atmospheric aerosols are complex environmental mixtures that come from anthropogenic and natural sources.  Primary sources emit aerosol directly to the atmosphere; such as motor vehicles, electric power utilities, biomass burning, plant detritus, and resuspended dust. Secondary aerosols form in the atmosphere, through chemical reactions and particle growth.  The physical and chemical properties of aerosols determine their environmental and health impacts.

Studies of ambient aerosol composition are used to understand its origin and gain insight to how aerosols transform in the environment. Several ongoing projects include (i) the characterization emissions from biomass burning, mobile source emissions, and secondary sources, (ii) the measurement and characterization of nitrogen and sulfur-containing organic molecules, and (iii) study of the spatial and temporal variation in ambient particulate matter and bioaerosols in Iowa.

Our research is motivated by the need to understand how ambient air pollution impacts human and environmental health. Poor air quality is associated with asthma and cardio-vascular diseases, increased hospital visits, and mortality. Yet, the chemical drivers behind these health endpoints are not well understood.  We also strive to better understand the role that aerosols play an important role in regulating climate, through direct and indirect radiative forcing. 

Our research incorporates field-based and laboratory experiments. We utilize a variety of quantitative analytical tools, including gas and liquid chromatography (GC and LC) to separate chemical species and enhance their detection and mass spectrometry (MS) for determination of marker species and quantitation.  Aerosol measurements are used to evaluate temporal and spatial variations in aerosol concentrations and in source apportionment models.  With an improved understanding aerosol composition and origins, the better equipped we are to manage air quality and protect human health.

Recent Publications: 
  • Kundu, S.; Quraishi, T.; Yu, G.; Suarez, C.; Keutsch, F.; Stone, E. A. “Evidence and Quantitation of Aromatic Organosulfates in Ambient Aerosols in Lahore Pakistan Atmospheric Chemistry and Physics, 2013, 13: 4865-4875.
  • Stone, E. A; Nguyen, T.T.; Pradhan B. B.; Dangol, P. M., Assessment of biogenic secondary organic aerosol in the Himalayas.  Environmental Chemistry, 2012, 9, 263-272, invited manuscript.
  • Stone, E. A.; Yang, L.M.; Yu, L.E.; Rupahketi, M., Characterization of Organosulfates in Atmospheric Aerosols at Four Asian Locations, Atmospheric Environment, 2012, 47, 323-329.
  • Olson, C. O.; Galloway, M. M.; Yu, G.; Hedman, C. J.; Lockett, M. R.; Yoon, T.; Stone, E.A.; Keutsch, F. N., Hydroxycarboxylic acid-derived organosulfates: synthesis, stability, and quantification in ambient aerosol.  Environmental Science & Technology, 2011, 45, 6468-6474. 
  • Stone, E. A.; Yoon, S.; Schauer, J. J., Composition of fine and coarse particulate matter in Gosan, Korea during the springtime dust season.  Aerosol and Air Quality Research, 2011, 11, 1, 31-43. 
  • Stone, E. A.; Schauer J. J.; Pradhan B. B.; Dangol, P. M., Habib, G.; Venkataraman, C., Source apportionment of carbonaceous aerosol in the Kathmandu Valley: Sensitivity to biomass source profiles.  Journal of Geophysical Research-Atmospheres 2010, 115, (D22).
  • Stone, E. A.; Schauer J. J.; Quraishi, T.; Mahmood A., Chemical characterization and source apportionment of fine and coarse particulate matter in Lahore, Pakistan.  Atmospheric Environment, 2010, 44, 1062-1070.
  • von Schneidemesser, E.; Stone, E. A.; Quraishi, T.; Shafer, M. M.; Schauer, J. J., Toxic metals in the atmosphere in Lahore, Pakistan.  Science of the Total Environment, 2010, 408 (7), 1640-1648. 
  • Stone, E. A.; Hedman, C. J.; Zhou, J.; Mieritz, M. M.; Schauer J. J., Schauer J. J., Insights to the nature of secondary organic aerosol in Mexico City during the MILAGRO Experiment 2006.  Atmospheric Environment, 2010, 44, 312-319.
  • Stone, E. A.; Hedman, C. J.; Sheesley, R. J.; Shafer, M. M.; Schauer J. J., Characterization of humic-like substances (HULIS) in North American aerosols using LC-MS/MS.  Atmospheric Environment, 2009, 73, (27), 4205-4213.
  • Stone, E. A.; Zhou, J.; Snyder, D. C.; Rutter, A. P.; Schauer, J. J., A comparison of summertime secondary organic aerosol at contrasting urban locations.  Environmental Science & Technology 2009, 43, 3448-3454.
  • Stone, E. A.; Snyder, D. C.; Sheesley, R. J.; Sullivan, A. P.; Weber, R. J.; Schauer, J. J., Source apportionment of fine organic aerosol in Mexico City during the MILAGRO experiment 2006. Atmospheric Chemistry And Physics 2008, 8, 1249-1259.
  • Stone, E. A.; Lough, G. C.; Schauer, J. J.; Praveen, P. S.; Corrigan, C. E.; Ramanathan, V., Understanding the origin of black carbon in the atmospheric brown cloud over the Indian Ocean. Journal of Geophysical Research-Atmospheres 2007, 112, (D22).