GC-IMS
– User Manual
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Complex analyte mixtures, like e.g. food flavours, often demand a second and
independent separation step in order to separately analyse the multiplicity of
compounds at low concentrations. Therefore G.A.S. -according to application- equips
its IMS systems with gas chromatographic (GC) columns. The volatile compounds of
samples under testing are pre-separated in time by a GC column. The discrete
compounds are consecutively fed into the IMS ionization chamber, so that analyte
and/or ion interactions are avoided.
Furthermore a competition of analytes on the reactant ions is excluded, enhancing
the sensitivity of the system for individual compounds.
The GC-IMS setup enables a twofold separation of analyte mixtures and the
detection by the IMS electrometer. Since the IMS measurements are extremely fast
(30ms / spectrum) a continuous and high-resolution recording of analyte signals is
provided.
Figure 5: GC-IMS measurement 3D
The above figure sketches the GC-
IMS measurement‘s 3D-dataset and the
corresponding heatmap visualization.
Summary of Contents for GC-IMS
Page 1: ...User Manual GC IMS G A S Gesellschaft f r analytische Sensorsysteme mbH...
Page 150: ...GC IMS User Manual 150 214 4 Device without top cover...
Page 164: ...GC IMS User Manual 164 214 17 Tighten the three screws of the frontplate...
Page 188: ...GC IMS User Manual 188 214 9 4 Technical drawing Internal Gasflow...
Page 212: ...GC IMS User Manual 212 214 Tutorials VOCal Manuals VOCal...
