The science of gas Chromatography is a technique that is used to facilitate the analysis of complicated mixtures of various substances. It can also help to provide for the separation of them.
Gas chromatography is used by forensic sciences as well as major chemical companies and even agricultural companies. Substances that are present in very small amounts in a large amount of another substance can be isolated and quantified fairly closely.
Using Gas chromatography, you can analyze mixed substances that are both organic as well as inorganic. The compounds that are easily analyzed by the use of gas chromatography are those whose boiling point are below 250 degrees Celsius or about 480 degrees Fahrenheit.
The process that Gas chromatography uses to introduce the substance is called the moving-gas stage. There is a carrier gas used. It is generally an inert gas. The most common inert gases that are used are helium or nitrogen. The gas is flowing through a column that has been packed with what is known as a sorbent.
The isolation of the chemical substance depends on
its passage through a liquid phase through a solid phase. It is also dependent upon
chemical interactions that subtly assist in the isolation of the substances.
Four components are basic to gas chromatography. These are:
Carrier Gas and Flow control
Gas chromatography is able to be divided into two classes. These are Gas liquid, where the stationary liquid stage is called into play that uses a stationary liquid. Gas-Solid chromatography relies upon a large granular surface area to aid in the separation of the substances.