Articles | Volume 2, issue 1
https://doi.org/10.5194/ar-2-199-2024
https://doi.org/10.5194/ar-2-199-2024
Research article
 | 
24 Jun 2024
Research article |  | 24 Jun 2024

Reduced particle composition dependence in condensation particle counters

Peter J. Wlasits, Joonas Enroth, Joonas Vanhanen, Aki Pajunoja, Hinrich Grothe, Paul M. Winkler, and Dominik Stolzenburg

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Cited articles

Barmpounis, K., Ranjithkumar, A., Schmidt-Ott, A., Attoui, M., and Biskos, G.: Enhancing the detection efficiency of condensation particle counters for sub-2 nm particles, J. Aerosol Sci., 117, 44–53, https://doi.org/10.1016/j.jaerosci.2017.12.005, 2018. 
Bondy, A. L., Bonanno, D., Moffet, R. C., Wang, B., Laskin, A., and Ault, A. P.: The diverse chemical mixing state of aerosol particles in the southeastern United States, Atmos. Chem. Phys., 18, 12595–12612, https://doi.org/10.5194/acp-18-12595-2018, 2018. 
Brilke, S., Resch, J., Leiminger, M., Steiner, G., Tauber, C., Wlasits, P. J., and Winkler, P. M.: Precision characterization of three ultrafine condensation particle counters using singly charged salt clusters in the 1–4 nm size range generated by a bipolar electrospray source, Aerosol Sci. Tech., 54, 396–409, https://doi.org/10.1080/02786826.2019.1708260, 2020. 
Dada, L., Lehtipalo, K., Kontkanen, J., Nieminen, T., Baalbaki, R., Ahonen, L., Duplissy, J., Yan, C., Chu, B., Petäjä, T., Lehtinen, K., Kerminen, V. M., Kulmala, M., and Kangasluoma, J.: Formation and growth of sub-3-nm aerosol particles in experimental chambers, Nat. Protoc., 3, 1013–1040, https://doi.org/10.1038/s41596-019-0274-z, 2020. 
Giechaskiel, B., Wang, X., Horn, H.-G., Spielvogel, J., Gerhart, C., Southgate, J., Jing, L., Kasper, M., Drossinos, Y., and Krasenbrink, A.: Calibration of Condensation Particle Counters for Legislated Vehicle Number Emission Measurements, Aerosol Sci. Tech., 43, 1164–1173, https://doi.org/10.1080/02786820903242029, 2009. 
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We highlight that the composition dependence of the counting efficiency of condensation particle counters can be immensely reduced by choice of the working fluid. A butanol- and a propylene glycol-based version of the Airmodus A30 was calibrated using a set of four different seed particles. Our study shows that composition-dependent counting efficiencies almost vanish in the case of the propylene glycol-based CPC. Simulations of supersaturation profiles were used to explain the results.
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