Negative atmospheric pressure chemical ionisation of NO2 by O2−·CO2·(H2O)n studied by ion mobility spectrometryE. Maťaš, L. Moravský, V. Ilbeigi and Š. MatejčíkEur. Phys. J. D, 77 2 (2023) 21DOI: https://doi.org/10.1140/epjd/s10053-023-00603-x