Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder

Demetrios Pagonis

Current Research

I am currently researching the chemistry of wildfire smoke aerosol. I am leading the deployment of an extractive electrospray mass spectrometer aboard the NASA DC-8 aircraft for the FIREX-AQ campaign, taking place summer 2019. Other projects focus on indoor air quality, aerosol chemistry, reactions of multifunctional hydroperoxides, and gas-wall partitioning in Teflon environmental chambers and Teflon sampling lines. 


Pagonis, D., Price, D. J., Algrim, L. B., Day, D. A., Handschy, A. V., Stark, H.,  Miller, S. L., de Gouw, J., Jimenez, J. L., and Ziemann, P. J. (2019) Time-resolved measurements of indoor chemical emissions, deposition, and reactions in a university art museum. Environmental Science and Technology.

Pagonis, D., Sekimoto, K., and de Gouw, J. (2019) A library of proton-transfer reactions of H3O+ ions used for trace gas detection. Journal of the American Society for Mass Spectrometry.

Pagonis, D. and Ziemann, P. (2018) Chemistry of hydroperoxycarbonyls in secondary organic aerosol. Aerosol Science and Technology, 10:1178-1193.

Pagonis, D., Krechmer, J. E., de Gouw, J., Jimenez, J. L., and Ziemann, P. J. (2017). Effects of gas-wall partitioning in Teflon tubing and instrumentation on time-resolved measurements of gas-phase organic compounds. Atmospheric Measurement Techniques, 10:4687-4696.

Petters, S. S., Pagonis, D., Claflin, M. S., Levin, E. J. T., Petters, M. D., Ziemann, P. J., and Kreidenweis, S. M. (2017). Hygroscopicity of organic compounds as a function of carbon chain length and carboxyl, hydroperoxy, and carbonyl functional groups. Journal of Physical Chemistry A, 121:5164-5174.

Krechmer, J. E., Pagonis, D., Ziemann, P. J., Jimenez, J. L. (2016). Quantification of gas-wall partitioning in Teflon environmental chambers using rapid bursts of low-volatility oxidized species generated in situ. Environmental Science & Technology, 50:5757–5765.

We utilize a wide range of analytical chemistry techniques to study the chemistry of organic aerosols, including LC, GC, mass spectrometry, FTIR, NMR, and more.

In 2017 we conducted a six-week field campaign at the CU Art Museum, measuring indoor air quality inside one of the art galleries.

View Publications

  • Claflin MS; Pagonis D; Finewax Z; Handschy A; Day DA; Brown WL; Jayne JT; Worsnop DR; Jimenez JL; Ziemann PJ. (Jan 2021). An in situ gas chromatograph with automatic detector switching between PTR- and EI-TOF-MS: isomer-resolved measurements of indoor air. Atmospheric Measurement Techniques , 14(1), 133-152. 10.5194/amt-14-133-2021