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Chromatography is a technique Carried out in labs to separate the elements in simple or complex mixtures. Although there are many forms of chromatography, they all Operate on exactly the same principle. Each of the various types feature a static stage, usually a sound, and something to take the intricate mixtures throughout the stationary phase, called the mobile phase, typically a gas or a liquid. Various types can be categorized based on the type of mobile phase used. If the mobile phase is liquid, then the method falls under the category of liquid chromatography. Likewise, if the mobile phase is gas, the method falls under the category of gas chromatography. Normally, the stationary phase is a porous solid, such as silica or alumina. The packaging of the stationary phase varies depending on different kinds of chromatography used.

Chromatography Column

By way of instance, in thin layer chromatography it is normal to have silica gel packed onto aluminum sheets as the stationary phase. In a column system that the stationary phase is often packed into a glass tube. The mobile phase is used to take the mix that is being separated through the stationary phase. In the case of liquid chromatography, the mobile phase is a solvent or mixture of solvents the mix is soluble in. By way of instance, dichloromethane or ethyl acetate. In the event of gas chromatography, the mobile phase is an inert gas, such as helium or nitrogen. All the different Kinds of chromatography work upon the same basic principle. As the titles imply, the mobile phase is ‘mobile’ and flows through a ‘static’ static phase. Since the moving mobile phase conveys the mix during the stationary phase, the individual components in the mixture are partitioned between the stationary and mobile phases.

This procedure permits the separation of elements in the mix because different components in the mixture have different interactions with the stationary and mobile phases. In practice, this Means that elements in the mix which ‘hold on more closely’ into the stationary phase, remain for more on the stationary phase. This means they are separated from other components in the mix that don’t ‘hold on as closely’ into the stationary phase. This is the cornerstone of what is chromatography as a separation technique. For example, in a simple liquid column chromatography system see diagram, Cotton wool or a glass sintered frit is set in the bottom of a glass column. The column is then packed with silica. There are different procedures to package the column, such as dry packing or a silica slurry.