What is the mobile and stationary phase in ion exchange chromatography?

In cation-exchange chromatography, the stationary phase, which consists of a large quantity of acid groups attached to a polymeric resin, is slurried with water and applied to a column. The mobile phase, which contains the inorganic salt dissolved in a suitable solvent, is applied to the column.

What type of stationary phase is packed in ion exchange chromatography column?

The equilibrated stationary phase consists of an ionizable functional group where the targeted molecules of a mixture to be separated and quantified can bind while passing through the column—a cationic stationary phase is used to separate anions and an anionic stationary phase is used to separate cations.

Are stationary phases in ion chromatography?

Ion Chromatography is a method for separating ions based upon their interactions with resin (stationary phase) and the eluent (mobile phase). These phases differ between an anion column, which attracts anions, and a cation column, which attracts cations.

What is the mobile phase in chromatography?

The mobile phase refers to the liquid or gas, which flows through a chromatography system, moving the materials to be separated at different rates over the stationary phase while stationary phase refers to the solid or liquid phase of a chromatography system on which the materials are to be separated or selectively …

What is size and ion exchange chromatography?

The key difference between ion exchange and size exclusion chromatography is that ion exchange chromatography is used to analyze ionic substances according to the charge whereas size exclusion chromatography is used to analyze large molecules according to the size.

What is the nature of mobile phase in reverse phase chromatography?

In reversed-phase chromatography, the mobile phase is very polar – water or mixtures of water with polar, water-miscible solvents – and the stationary phase is nonpolar, often a 18-carbon-long hydrocarbon attached to the surface of silica or closely related materials.

What is mobile phase and stationary?

The stationary phase is the phase that doesn’t move and the mobile phase is the phase that does move. The mobile phase moves through the stationary phase picking up the compounds to be tested. As the mobile phase continues to travel through the stationary phase it takes the compounds with it.

What is meant by mobile phase and stationary phase?

The stationary phase remains fixed in place while the mobile phase carries the components of the mixture through the medium being used. The stationary phase acts as a constraint on many of the components in a mixture, slowing them down to move slower than the mobile phase.

In which chromatography stationary phase is less polar than mobile phase?

Stationary phases are usually very polar, while mobile phases vary widely in polarity, but are less polar than the stationary phase. This is called normal phase (NP) chromatography. The exception is reverse phase (RP) chromatography, in which a polar mobile phase, and a less polar stationary phase are used.

What is the stationary phase in ion exchange chromatography?

In ion-exchange chromatography (IEC) the stationary phase is a cross-linked poly- mer resin, usually divinylbenzene cross-linked polystyrene, with covalently attached ionic functional groups.

What happens in the mobile phase of a column chromatography?

As the mobile phase passes through the column, exchange between the H+ ions on the polymeric ion-exchange resin of the stationary phase and the cations of the salt in the mobile phase occur. The solution which is collected at the bottom of the column contains the acid form of the inorganic salt.

What is the principle of ion exchange chromatography?

In a similar fashion, ion-exchange chromatography can be used to convert a known quantity of an unknown salt into an acid or a base. Figure 1 There are two general principles involved in ion-exchange chromatography. These include the mobile phase and the stationary phase.

What is the difference between strong cation exchange and anion exchange column?

A column is used that is filled with a charged stationary phase on a solid support, called an ion-exchange resin. Strong cation-exchange chromatography preferentially separates out cations by using a negatively-charged resin while strong anion-exchange chromatography preferentially selects out anions by using a positively-charged resin.