Ion Mobility Spectrometer
(latest version: IonMobilitySpectrometer25)

The Ion Mobility Spectrometer (latest version: IonMobilitySpectrometer25)  features exceptional sensitivity and a second dimension of separation (full orthogonality) and is licence-free.

The Ion Mobility Spectrometer (latest version: IonMobilitySpectrometer25) from G.A.S. mbH enables the use of IMS technology in conjunction with laboratory gas chromatographs (GC) in highly demanding analytical applications where maximum separation properties and/or exceptional sensitivity are required. Compared to other detectors, IMS technology has a second separation dimension and is therefore fully orthogonal, meaning that co-eluting substances are separated from each other before they are detected in the low/sub-ppb range. This is because, according to the IMS principle, which operates at atmospheric pressure, the ions formed are separated from each other according to their mass and structure. This means that even isomers can be separated from each other. The tritium source used has a very low intensity and is therefore exempt from licensing under DIRECTIVE 2013/59 EURATOM. The detector's operation is selectable and can be used in positive drift voltage mode, for example, which is ideal for detecting compounds with heteroatoms that are relevant in the detection of (off-) odours. It also has exceptional sensitivity in negative mode, for example when measuring halogenated or sulphurous compounds.

The compact, pre-assembled unit is supplied “ready to connect” including software for the detector parameters and for setting the purge gas flow. The customised transfer line is temperature-controlled and prevents “cold spots”. Due to the use of the oven outlet and positioning of the IMS on the right-hand side, the MSD (mass-selective detector), which is typically mounted on the left-hand side, can continue to be used in parallel.