About Cogent IEX HPLC Columns

Cogent IEX HPLC Columns are silica-based ion-exchange columns designed for the separation of charged compounds using highly reproducible stationary phases and robust column hardware. Available in strong and weak cation-exchange as well as strong and weak anion-exchange chemistries, these columns are suitable for pharmaceutical, biotechnology, environmental, food, and general analytical applications.

Used in both USP methods and laboratory-developed methods, Cogent IEX columns provide reproducible selectivity, excellent peak shape, and long column lifetimes for demanding ion-exchange separations.

What is Ion-Exchange Chromatography?

Ion-exchange chromatography separates compounds based on differences in ionic charge. The stationary phase contains charged functional groups that selectively interact with oppositely charged analytes, allowing compounds to be retained and separated according to their charge characteristics.

Ion-exchange methods are commonly used for:

• Organic acids
• Amines and basic compounds
• Peptides
• Proteins
• Biopharmaceuticals
• Ionic impurities
• Charged metabolites
• Pharmaceutical active ingredients and related substances

Available Cogent IEX Stationary Phases

Strong Cation Exchange (SCX)

Sulfonic acid bonded phases designed for the retention and separation of positively charged compounds across a wide pH range.

Weak Cation Exchange (WCX)

Carboxylic acid bonded phases that provide alternative selectivity and retention mechanisms for cationic analytes.

Strong Anion Exchange (SAX)

Quaternary amine stationary phases for the separation of negatively charged compounds and ionic species.

Weak Anion Exchange (WAX)

Diethylamino bonded phases offering flexible selectivity for anionic compounds and biomolecules.

Why Choose Cogent IEX Columns?

High-Purity Silica Support

Manufactured using high-purity spherical silica to promote consistent chromatographic performance and reproducible separations.

Reliable Peak Shapes

Designed to provide efficient separations with excellent peak symmetry and reproducibility.

Consistent Manufacturing

Produced using modern packing technologies and rigorous quality controls to support laboratories requiring dependable analytical results.

Scalable Methods

Available in analytical and guard column formats with additional dimensions available for method scale-up and larger sample loads.

Long-Term Technical Support

MICROSOLV provides technical assistance for column selection, method development, troubleshooting, optimization, and method transfer support.

Standard Column Dimensions

Common analytical formats include:

• 2.1 mm ID columns
• 4.6 mm ID columns
• Guard columns

Additional dimensions may be available upon request.

Applications

Cogent IEX columns are commonly used for:

• Pharmaceutical analysis
• Biopharmaceutical characterization
• Method development
• USP and compendial methods
• Quality control testing
• Impurity analysis
• Protein and peptide separations
• Ionic compound analysis

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More Information about Cogent IEX™ Columns:

FAQ - General HPLC Tips   (Resource Center)	Ordering Information - Cogent IEX™ Columns
Specifications Page	USP© Classification List