This temperature when temperature programming is needed can be increased in a controlled way for acquiring effective separation of mixture components possessing different volatilities. The column is enclosed by a column oven which is responsible for maintaining a constant temperature during isothermal operation. This is done for selective absorbance and retention of the sample components.Ĭommonly used: Packed columns and Capillary columns (More popular) Component of a Column – Oven This is filled with the stationary phase or its walls are covered with a liquid adsorbent. With the help of a gas-tight syringe, the liquid sample mixtures are injected whereas, with the help of automated injection valves, the gaseous mixtures are injected. Through the carrier gas stream, the sample is spontaneously vaporized and led to the column. The injector is a heated block where the sample is injected. Before being led to the gas chromatographic system, the above three are intermixed in the desired proportion. Zero air – These are the purified air that plays the role of oxidant to support the combustion of flame in the detector.Fuel gas – They support the flame in Flame ionization detector (FID) detector such as Hydrogen.They are also responsible for the subsequent transfer of separated components to the detector.Common examples: Nitrogen, helium, or hydrogen
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