Anion exchange chromatography operates by exploiting the electrostatic attractions between positively charged functional groups on a stationary phase and negatively charged molecules in a sample mixture. Factors Influencing Resolution and Yield Several critical parameters dictate the success of anion exchange chromatography, including buffer pH, ionic strength, flow rate, and column dimensions.
Designing an Impurity Removal Strategy for Bioprocess Optimization
Conversely, when the pH is above the isoelectric point, the protein acquires a net negative charge, allowing it to interact with the positively charged groups on the resin. A slight adjustment in pH can dramatically alter the binding affinity, turning a strong retention state into complete non-binding.
It is a vital step in removing endotoxins, host cell proteins, and other process-related impurities from biopharmaceutical products. The Step-by-Step Process During the procedure, the sample is introduced to the column in a buffer solution that equilibrates the matrix.
Designing an Impurity Removal Strategy for Biopharmaceutical Purification
Unbound components are subsequently washed away using a buffer of consistent composition. Strong anion exchisers, such as quaternary ammoniumethyl (Q) groups, maintain a consistent positive charge across a wide pH range.
More About How does anion exchange chromatography work
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