Gas Chromatography Instruments(GC)


Gas chromatography (GC) is a common type of chromatography used in analytical chemistry to separate and analyze compounds that can be separated during the vapor phase without decomposition. This analytical chemistry instrument, the Gas Chromatograph (also known as aerograph or gas separators) can be used to test the purity of a particular substance, or for separating the different components of a mixture . In some instances, GC may be used to identify a compound. In preparative chromatography, GC can be used to prepare pure compounds from a mixture.

GC Equipment

Gas Chromatography equipment generally includes all the components needed for separation, such as: a-d Converters , Accessories, Autosamplers, Columns, Concentrators, Gas-Purification, GC Software, Head Space, Inlet-Liner-Supplies, Sample Concentrator,and Complete GC Systems.

New & Used GC Chromatography Instruments

Hewlett Packard ( HP ), Perkin Elmer (PE), Shimadzu, Agilent, Varian, Thermo are preferred manufacturers and have great brand awareness. Common detectors used on GC instruments are: Thermal Conductivity detector ( TCD ), Flame Ionization detector ( FID ), Electron capture detector ( ECD ), Hall electrolytic conductivity detector ( ElCD ), and Photo-ionization detector ( PID ). Integrator’s were used for many years but computers are used to control, record and interpret the data. Familiar software names are Chemstation, TurboChrom, Clarity are just a few.   

Gas-Liquid Chromatography

Gas chromatography is similar to column chromatography as well as other forms of chromatography, such as HPLC and TLC. In GC chromatography, the compound separation process in a mixture is carried out between a liquid stationary phase and a gas mobile phase, (in column chromatography the stationary phase is a solid and the mobile phase is a liquid). "Gas–liquid chromatography" also features a temperature oven controlled column through which the gas phase passes whereas column chromatography does not usually offer temperature control.

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photo of GC Equipment