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Ilkka Haapala, Markus Karjalainen, Anton Kontunen, Antti Vehkaoja, Kristiina Nordfors, Hannu Haapasalo, Joonas Haapasalo, Niku Oksala and Antti Roine

distinguishing factor. 1 Mass spectrometry operates in a high vacuum, which poses considerable costs and mechanical challenges. In particular, ion mobility spectrometry (IMS) characterizes substances in atmospheric pressure based on cross-sectional area and electrical charge of the molecules. 18 Differential mobility spectrometry (DMS) is an advanced adaptation of IMS. It uses a high-frequency electric field to break molecule clusters, thus creating additional information about the cluster strength that can be used in the analysis. Compared with mass spectrometry, the DMS is