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Liquid Chromatography Techniques for Separating Complex Mixtures

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Steve martin
Liquid Chromatography Techniques for Separating Complex Mixtures

A potent separation method used to separate complicated mixtures into their constituent parts is liquid chromatography (LC). This method has a wide variety of applications in several industries, including forensics, food & beverage, pharmaceuticals, and environmental monitoring. By passing a sample mixture through a stationary phase that reacts differently with each component, the primary idea behind liquid chromatography is to separate the sample mixture's constituent parts. The sample combination is dissolved in a mobile phase before being pushed through a column of stationary phase. Based on their chemical and physical characteristics, such as size, form, polarity, and charge, the various mixture components are divided.


High-performance liquid chromatography (HPLC), reversed-phase liquid chromatography (RPLC), ion-exchange chromatography (IEC), size-exclusion chromatography (SEC), and affinity chromatography (AC) are a few of the different types of liquid chromatography techniques that are used to separate complex mixtures.

One of the most used chromatographic methods for separating difficult mixtures is HPLC. It is quite effective and offers great component-by-component resolution. In HPLC, a column containing a stationary phase comprised of very small-diameter particles is pumped with the mobile phase within. High-pressure, high-resolution separations are the outcome.


Another widely used chromatographic method for separating nonpolar and moderately polar substances is RPLC. The stationary phase and mobile phase in RPLC are both polar. As a consequence, the compounds are separated according to their polarity.


Proteins, peptides, and nucleic acids are examples of charged substances that may be separated by IEC. IEC produces a separation based on the charge of the molecules since the stationary phase has an opposing charge to the molecules being separated.


SEC is used to divide molecules into groups according to size. Molecules of various sizes can pass through the stationary phase of an SEC reaction at various speeds due to the presence of porous particles in the particles. As a result, the molecules are separated according to their sizes.


According to a molecule's affinity for a certain ligand, molecules can be divided using AC. A ligand unique to the molecule being separated is present in the stationary phase of AC. As a result, the molecules are separated according to their affinity for the ligand.

Read more: http://inspiredinsightscmi01.weebly.com/article/the-basics-of-liquid-chromatography-a-comprehensive-guide


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