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The Gas Chromatograph - Ion Mobility Spectrometer (GC-IMS) combines the high selectivity of a chromatographic separation with the extraordinary sensitivity (low ppbv or µg/L range) of an IMS. Therefore, it is an excellent analytical tool, even for measurements in complex matrices. Due to the possibility to change the polarity of the drift voltage the GC-IMS can detect several substances e.g. ketones, aldehydes, alcohols, amines, sulfates and phosphor organics as well as halogenated compounds. The chromatographic pre-separation enables to overcome the technological limitations of the IMS technology caused by ion-ion inter-actions in complex mixtures and hence assures a selective identification.

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Descripción detallada


The GC-IMS has integrated temperature and flow controller allowing firmware steered ramping to better separate highly volatile compounds and shorten run times, which is decisive QC related assignments. The availability of positive same as negative ionisation modes enables the applicability for a wide range of substances e.g. ketones, aldehydes, alcohols, amines, phosphor organics same as chlorinated or halogenated compounds. 

The integrated six-port valve secures a very flexible sampling of gases. Further to that, all relevant measurement parameters for method development are easy to access so that the operator can optimize the system with regard to his specific application.

The technical configurations with gas chromatographic (GC) columns include standard capillary (15-60m) or multi-capillary of various stationary phases that selected acc. to the requirements of the analytical assignments.

The GC-IMS operates isotherm in a range of 40-80°C and >100°C for baking out (cleaning).  The GC-IMS provides an automatic data acquisition on the device and when connected to a PC 3-D data visualization and analysis by G.A.S. software suite called Laboratory Analytical Viewer (LAV).  Besides the possibility of quantifying single marker compounds additional software plug-ins, allow to easy detect the appearance of new compounds or the differences of concentrations of existing compounds. The result classifies differences from a selected reference (golden standard) to characterize quickly e.g. the quality of a sample. 

An easy menu, manual or automatic operation modes as well as data acquisition, -analysis on board plus analogue data output via 4-20mA current loop facilitates a remote online process control. While the standard configuration of the GC-IMS requires N2 or synthetic for its operation, it can alternatively be equipped with a circular gas flow unit (CGFU) to be independent from any external gas supply. All these characteristics together represent highest flexibility and make up the usefulness of the GC-IMS as analytical online and/or on-site tool. 

Through this, the device can applied for several analytical measurements e.g. testing for residual solvents, impurities from production, off-flavour detection, product or ingredients authentication, bad smell or TICs monitoring from industrial plants, perfume and cosmetics on human skin, etc.

As an additional on-site tool and for to be independent from the use of gas cylinders, G.A.S. has developed a circular gas flow unit (CGFU) to be coupled and supplied through the GC-IMS. By that, only power needed to have a portable field approved trace analyser.



Ionisation method: ß-radiation

Source: Tritium (3H)

Activity: 300 MBq, below the exemption limit of 1 GBq EURATOM guideline, no licence required

Column type: Multi Capillary Column (MCC) or Capillary Column (CC) –various stationary phases available

Sampling: Integrated pump plus heated electrical 6-port-valve (stainless steel), gas tight loop (1-10 mL)

Detection limit: Typically low ppbv-range

Dynamic range: 1-3 orders of magnitude

Display: Touchscreen 6.4”TFT

Communication: RS232, USB, Ethernet

Power: 100 –240 V AC, 50-60 Hz (external)

             24 V DC / 8.3A, XLR-connector (internal)

Power consumption: < 200 Watt

Dimensions: 449 x 435 x 177 mm (WxDxH)

Weight: 15,5 kg or34,2 lb

Housing: 19” compatible, IP 20 enclosure, CE Marking


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