Columns in Gas Chromatography

The stationary phase is the non-movable phase in chromatographic techniques. The mobile phase together with the test sample is moved through the stationary phase. During this passage of the mobile gas and the test sample the components in the test sample is separated. The stationary phase is packed inside a column in most chromatographic techniques. In Gas Chromatography two types of columns are used. Those are namely,

• Packed column 
• Capillary column 

Depending on the packed material the column differs.