SEA iGC

IGC SEA Surface energy analyzer

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The Inverse Gas Chromatography-Surface Energy Analyzer or iGC-SEA continues Surface Measurement Systems’ pioneering history with inverse gas chromatography (IGC).

The iGC-SEA is a second generation Inverse Gas Chromatography instrument. It is the only commercial instrument based on IGC principle. The unique SMS injection scheme provides a wide range of injection concentrations with high accuracy and reproducibility.

Productbeschrijving

How does the iGC-SEA work?

The iGC-SEA is based on Inverse Gas Chromatography (IGC) methodology. And is a gas phase technique for characterising surface and bulk properties of solid materials. The principles of IGC are very simple, being the reverse of a conventional gas chromatographic (GC) experiment. A column is packed with your solid material of interest, typically a powder, fibre or film. A pulse of gas is injected down the column at a fixed carrier gas flow rate, and the time taken for the pulse to elute down the column is measured. A series with different gas phase molecules then allows access to a wide range of phyisco-chemical properties of the actual sample.

The injected gas molecules passing over the material adsorb on the surface with a partition coefficient KS:

Ks = Vn / Ws

Where VN is the volume of carrier gas required to elute the injection through the column, and WS is the mass of the sample. Vn is a measure of how strongly the probe gas interacts with the solid sample and is the fundamental data obtained from an IGC experiment.

Instrument features include:
  • Unrivalled accuracy and repeatability
  • Fully automated operation
  • Comprehensive data analysis software
  • Up to 12 different probe gas molecules
  • User friendly wizard based software
  • Optional humidity control
  • In-Situ sample pre-conditioning
  • Wide temperature range
  • Column packing accessory