Articles | Volume 18, issue 16
https://doi.org/10.5194/amt-18-3945-2025
https://doi.org/10.5194/amt-18-3945-2025
Research article
 | 
25 Aug 2025
Research article |  | 25 Aug 2025

The coupling of a high-efficiency aerosol collector with electrospray ionisation–Orbitrap mass spectrometry as a novel tool for real-time chemical characterisation of fine and ultrafine particles

Yik-Sze Lau, Zoran Ristovski, and Branka Miljevic

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Cited articles

Bates, J. T., Fang, T., Verma, V., Zeng, L., Weber, R. J., Tolbert, P. E., Abrams, J. Y., Sarnat, S. E., Klein, M., Mulholland, J. A., and Russell, A. G.: Review of acellular assays of ambient particulate matter oxidative potential: methods and relationships with composition, sources, and health effects, Environ. Sci. Technol., 53, 4003–4019, https://doi.org/10.1021/acs.est.8b03430, 2019. 
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Brown, R. A., Stevanovic, S., Bottle, S., and Ristovski, Z. D.: An instrument for the rapid quantification of PM-bound ROS: the Particle Into Nitroxide Quencher (PINQ), Atmos. Meas. Tech., 12, 2387–2401, https://doi.org/10.5194/amt-12-2387-2019, 2019b. 
Brown, R. A., Stevanovic, S., Bottle, S., Wang, H., Hu, Z., Wu, C., Wang, B., and Ristovski, Z.: Relationship between atmospheric PM-bound reactive oxygen species, their half-lives, and regulated pollutants: investigation and preliminary model, Environ. Sci. Technol., 54, 4995–5002, https://doi.org/10.1021/acs.est.9b06643, 2020. 
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Short summary
The chemical properties of aerosols in the atmosphere significantly influence their impact on global climate and human health. The current study constructed an instrumental system (HEAC (high-efficiency aerosol collector)/ESI (electrospray ionisation)-Orbitrap-MS (mass spectrometer)) for the real-time chemical analysis of aerosol samples. The combined system successfully identified over 30 chemical compounds in aerosol samples in real time, showing the robustness of the technique for the chemical characterisation of aerosols under atmospherically relevant conditions.
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