Expert Topics

Troubleshooting Support for HPLC

Having issues with your HPLC system? Our troubleshooting guide offers solutions for common problems, ensuring optimal performance in your analytical processes.

Read more

Expertise portal: More expert content for you

In our expertise area, we have compiled extensive knowledge and supporting digital services for you. Use our extensive knowledge database and the numerous calculators of our expertise portal.

Read more

Online presentations: Experience us live

In our online presentations, we pass on our expert knowledge to you and answer all your questions. Book an online presentation on a specific topic and meet us live.

Read more

Guide to Ion Exchange Chromatography (IEX) for HPLC & UHPLC

What Are Ion Exchange Columns?

Ion Exchange Chromatography (IEX) is a highly effective separation technique used in HPLC & UHPLC for biomolecule analysis and purification. It is based on the interaction between charged analytes and a charged stationary phase. IEX columns are designed to separate proteins, peptides, and nucleic acids based on their charge properties. There are two main types of Ion Exchange Columns:

  • Cation Exchange Chromatography (CEX): Used for positively charged analytes, where a negatively charged stationary phase attracts cations.

  • Anion Exchange Chromatography (AEX): Used for negatively charged analytes, where a positively charged stationary phase attracts anions.

YMC’s BioPro IEX columns are specifically developed for high-resolution separations, offering superior binding capacity and recovery compared to conventional IEX columns.

How Ion Exchange Chromatography Works

The separation process in ion exchange chromatography is influenced by several key factors:

  • pH and buffer selection:The pH of the mobile phase affects the charge of both the stationary phase and the analyte, altering binding affinity

  • Salt concentration: Gradual increases in salt concentration during elution help release bound analytes in a controlled manner.

  • Porous vs. non-porous particles: Non-porous particles provide faster separations with higher resolution, while porous particles allow higher binding capacities for preparative applications.

YMC’s BioPro IEX columns utilize monodisperse, spherical polymer beads, ensuring optimal peak shapes and high reproducibility for anion and cation exchange chromatography.

 

Choosing the Right IEX Column for Your Application

Selecting the right IEX column depends on the size and charge properties of the biomolecule:

  • BioPro IEX Q (strong anion exchanger) and BioPro IEX S (strong cation exchanger) are ideal for proteins and peptides.

  • BioPro IEX Smart Columns provide high dynamic binding capacities, suitable for challenging biomolecule separations.

  • Non-porous IEX columns enable high-speed separations in analytical workflows, while porous variants maximize loading capacity for preparative applications.

Applications of Ion Exchange Chromatography in HPLC & UHPLC

Ion Exchange Columns play a crucial role in biopharmaceutical research and analytical workflows, offering:

  • High-resolution separations of proteins, peptides, and nucleotides

  • Reliable performance in method development & validation

  • Fast and efficient purification in biopharma and proteomics applications

 

Need help selecting the right IEX column for your bioseparation workflow? Contact YMC Europe for expert advice and customized solutions.

Contact us for consultation
  • YMC Europe GmbH
  • Phone +49 2064 427-0
  • Schöttmannshof 19
  • Fax +49 2064 427-222
  • D-46539 Dinslaken