Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 3
Articles | Volume 18, issue 3
https://doi.org/10.5194/amt-18-603-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-603-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 3
Research article
 | 
03 Feb 2025
Research article |  | 03 Feb 2025

A novel methodology for assessing the hygroscopicity of aerosol filter samples

Nagendra Raparthi, Anthony S. Wexler, and Ann M. Dillner

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Cited articles

Anunciado, M. B., De Boskey, M., Haines, L., Lindskog, K., Dombek, T., Takahama, S., and Dillner, A. M.: Stability assessment of organic sulfur and organosulfate compounds in filter samples for quantification by Fourier-transform infrared spectroscopy, Atmos. Meas. Tech., 16, 3515–3529, https://doi.org/10.5194/amt-16-3515-2023, 2023. 
Boreddy, S. K. R., Kawamura, K., and Jung, J.: Hygroscopic properties of particles nebulized from water extracts of aerosols collected at Chichijima Island in the western North Pacific: An outflow region of Asian dust, J. Geophys. Res.-Atmos., 119, 167–178, https://doi.org/10.1002/2013JD020626, 2014. 
Boris, A. J., Takahama, S., Weakley, A. T., Debus, B. M., Fredrickson, C. D., Esparza-Sanchez, M., Burki, C., Reggente, M., Shaw, S. L., Edgerton, E. S., and Dillner, A. M.: Quantifying organic matter and functional groups in particulate matter filter samples from the southeastern United States – Part 1: Methods, Atmos. Meas. Tech., 12, 5391–5415, https://doi.org/10.5194/amt-12-5391-2019, 2019. 
Bouzidi, H., Zuend, A., Ondráček, J., Schwarz, J., and Ždímal, V.: Hygroscopic behavior of inorganic–organic aerosol systems including ammonium sulfate, dicarboxylic acids, and oligomer, Atmos. Environ., 229, 117481, https://doi.org/10.1016/j.atmosenv.2020.117481, 2020. 
Chan, C. K., Flagan, R. C., and Seinfeld, J. H.: Water activities of NH4NO3/(NH4)2SO4 solutions, Atmos. Environ. A-Gen., 26, 1661–1673, https://doi.org/10.1016/0960-1686(92)90065-S, 1992. 
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Quantifying the composition-dependent hygroscopicity of aerosol particles is essential for advancing our understanding of atmospheric processes. Existing methods do not integrate chemical composition with hygroscopicity. We developed a novel method to assess the water uptake of particles sampled on aerosol filters at relative humidity levels up to 97 % and link it with their composition. This approach allows for the separation of total water uptake into inorganic and organic components.
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