Effect of Humidity on the Mobilities of Small Ions in Ion Mobility Spectrometry.

ABSTRACT: Ions in the ion mobility spectrometry (IMS) are mostly hydrated. A single peak in the drift time spectrum is usually generated by a mixture of ions differing in the number of attached water molecules. Under real IMS detector operating conditions, ions change their composition during movement in the drift region due to the changes in the number of water molecules attached to the ion. The impact of water vapor on the drift times of small ions at different temperatures was studied experimentally using an ion mobility spectrometer. The experiments were carried out for hydronium, ammonium, oxygen, chloride, bromide, and iodide ions. A theoretical model was developed, allowing us to calculate the effective mobility of ions for a given concentration of water vapor and temperature. The basic assum

SUBMITTER: Wolanska I 

PROVIDER: S-EPMC10248996 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature