Ion exchange chromatography (IEC) is a powerful separation technique used to separate and purify charged molecules based on their interactions with ion exchange resins. In IEC, the stationary phase consists of charged functional groups immobilized on a solid support, while the mobile phase is a buffer solution. The sample is applied to the column, and molecules with charges opposite to that of the stationary phase are retained, while molecules with similar charges are eluted first. IEC is commonly used to separate proteins, peptides, nucleic acids, and charged small molecules. Different types of ion exchange resins, such as cation exchange resins and anion exchange resins, are utilized depending on the charge properties of the analytes. IEC offers high resolution and selectivity, making it suitable for complex mixtures and biomolecules. It is widely used in biochemistry, pharmaceuticals, biotechnology, and environmental analysis for purification and characterization purposes. Continuous advancements in column chemistry, instrumentation, and automation improve the efficiency and reproducibility of IEC. Collaboration between researchers and industry professionals drives innovation in IEC, expanding its applications and capabilities for various analytical needs.
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