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GAS CHROMATOGRAPHY - Coggle Diagram
GAS CHROMATOGRAPHY
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INSTRUMENTATION -
Pressure regulator - Pressure is adjusted within the limits of 1 to 4 atmospheres while the flow control valve measures 1 to 1000 liters per minute of gas
Sample injection port - amples are injected by a micro syringe through a self-sealing silicon rubber septum in a heated metal
Gas chromatography column -The gas chromatography column can be made by tubing coiled into an open spiral. We used copper or stainless steel for high-temperature operation
Stationary phase - Gas liquid chromatography can be available in almost an infinite variety of liquid partition materials
Detector - among these TCD is the most popular.
A flame ionization detector (FID) is most useful where the effluent is suitably attenuated by a stream splitter.
Ii is located near the column to avoid condensation of liquids.
Signal recorder - it is used to record signal frequency ratio and to analyse the spectrum and wavelength frequency
DEFINATION - Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analysing compounds that can be vaporized without decomposition.
PRINCIPLE - A gas chromatograph is made of a narrow tube, known as the column, through which the vaporized sample passes, carried along by a continuous flow of inert or nonreactive gas. Components of the sample pass through the column at different rates, depending on their chemical and physical properties and the resulting interactions with the column lining or filling, called the stationary phase.
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TEMPERATURE STUDY OF GC - s the process of increasing the column temperature during a run. It is a very effective method for optimizing an analysis and is often used for screening new samples. Most methods in capillary GC are temperature programmed
THEORY - Gas chromatography is often used to determine the purity of an unknown substance or to separate out the components of an unknown mixture so that each of the different parts can be analysed. It is a technique that can be used to detect samples in very small quantities.