90um Fast Flow Ion Exchange Chromatography Media Q FF 6% Q TopIEX FF

90 μm Q FF Fast Flow Anion Exchange Chromatography Media – Q TopIEX FF

SHBC Q TopIEX FF is a fast-flow strong anion exchange chromatography medium based on highly crosslinked 6% agarose beads with an average particle size of 90 μm.

The matrix is functionalized with quaternary ammonium (Q) strong anion exchange groups and is designed for rapid capture, intermediate purification and process-scale separation of proteins and other biomolecules.

The 90 μm bead size and highly crosslinked agarose structure make Q TopIEX FF suitable for laboratory development, pilot-scale purification and large-scale downstream bioprocessing.

Q TopIEX FF Technical Specifications

What Is Q FF Anion Exchange Media?

Q FF is a strong anion exchange chromatography medium containing positively charged quaternary ammonium functional groups.

The Q ligand provides strong anion exchange functionality and is widely used in preparative protein purification and industrial downstream processing.

A leading commercial Q FF resin from Cytiva is likewise manufactured from crosslinked 6% agarose beads containing quaternary ammonium groups and is used for protein capture and intermediate purification.

How Strong Anion Exchange Chromatography Works

Anion exchange chromatography separates biomolecules according to differences in surface charge.

The Q ligand carries a positive charge and can interact with negatively charged proteins, nucleic acids and other biomolecules under suitable buffer conditions.

A typical purification process is:

Sample Loading → Anionic Target/Impurities Bind → Washing → Salt or pH Adjustment → Elution

Whether a protein binds strongly depends on:

• Protein isoelectric point (pI)

• Buffer pH

• Ionic strength

• Salt concentration

• Ligand density

• Sample composition

Thermo Fisher describes AEX chromatography as a process in which negatively charged biomolecules interact with positively charged chromatography media, enabling purification and impurity removal according to charge differences.

6% Highly Crosslinked Agarose Matrix

Q TopIEX FF uses a highly crosslinked 6% agarose matrix.

The agarose matrix provides:

• Hydrophilic bead structure

• Low nonspecific hydrophobic interaction

• Porous biomolecule-accessible matrix

• Good packed-bed characteristics

• High bead rigidity

• Fast-flow process capability

• Suitability for scale-up

The combination of 6% agarose + multiple crosslinking + 90 μm particles is especially suitable for preparative and process chromatography.

Cytiva also uses crosslinked 6% agarose as the base matrix for its industrial Q Sepharose Fast Flow strong anion exchanger.

Key Advantages of Q TopIEX FF

• 6% highly crosslinked agarose matrix

• 90 μm average particle size

• Quaternary ammonium Q functional groups

• Strong anion exchange chemistry

• Fast-flow chromatography design

• Suitable for protein capture

• Suitable for intermediate purification

• Suitable for impurity removal

• Hydrophilic agarose matrix

• Suitable for process scale-up

• Laboratory to production-scale supply

• Bulk manufacturing capability

Why Choose 90 μm Q FF Media?

Particle size affects column efficiency, pressure and process throughput.

The 90 μm average particle size is particularly suitable for fast-flow preparative chromatography because it provides a practical balance between:

• Chromatographic performance

• Flow rate

• Column pressure

• Mass transfer

• Packed-bed stability

• Process throughput

• Scale-up capability

For comparison, Cytiva's commercial Q Sepharose Fast Flow also has an average particle diameter of approximately 90 μm, with a published particle-size range of 45–165 μm.

Protein Purification Applications

Q TopIEX FF can be evaluated for purification of:

• Recombinant proteins

• Acidic proteins

• Neutral proteins under suitable pH conditions

• Enzymes

• Protein complexes

• Antibody-related process streams

• Peptides

• Other negatively charged biomolecules

Strong Q-type anion exchangers are widely used for preparative protein purification. Bio-Rad, for example, positions its strong Q anion exchange media for rapid purification of acidic and neutral proteins and peptides at analytical through process scale.

Biopharmaceutical Downstream Processing

Q TopIEX FF is designed for process-development and downstream purification workflows.

Potential applications include:

• Recombinant protein purification

• Monoclonal antibody process development

• Vaccine-related purification

• Viral vector purification

• Virus purification

• Plasmid DNA purification

• Nucleic acid purification

• Intermediate purification

• Polishing chromatography

• Impurity removal

Process-scale anion exchange chromatography is widely used for therapeutic proteins, monoclonal antibodies, viral vectors and plasmid DNA purification.

Capture and Intermediate Purification

Q TopIEX FF can be evaluated at different stages of downstream purification.

Capture Chromatography

Q TopIEX FF may be used to bind a negatively charged target molecule directly from a clarified process stream under optimized conditions.

Potential goals include:

• Target concentration

• Initial impurity removal

• Volume reduction

• Preparation for subsequent chromatography steps

Intermediate Purification

Q TopIEX FF can also be used after initial capture to improve purity by separating the target from:

• Host-cell proteins

• Nucleic acids

• Process contaminants

• Product-related impurities

• Other charged biomolecules

Industrial Q FF media are commonly positioned for both capture and intermediate protein purification.

Bind-and-Elute Mode

In bind-and-elute chromatography, operating conditions are selected so that the target biomolecule binds to the positively charged Q ligand.

Typical process:

Equilibrate → Load → Target Binding → Wash → Elute → Regenerate

Elution is commonly achieved by increasing ionic strength or modifying buffer conditions.

Bind-and-elute mode can be useful when the goal is:

• Target capture

• Target concentration

• Protein fractionation

• Separation of charged variants

• Intermediate purification

Flow-Through Mode

Q TopIEX FF may also be evaluated in flow-through purification.

In this mode, process conditions are selected so the desired product passes through the column while negatively charged contaminants bind to the Q resin.

Potential impurity targets include:

• Host-cell DNA

• Residual nucleic acids

• Host-cell proteins

• Endotoxin

• Viruses

• Aggregates

• Other negatively charged contaminants

Thermo Fisher identifies both bind/elute and flow-through modes as important applications of process-scale anion exchange chromatography, including removal of DNA, host-cell proteins, aggregates and endotoxin.

Monoclonal Antibody Purification

Strong anion exchange chromatography is often used as part of monoclonal antibody downstream purification.

Depending on antibody properties and process conditions, Q TopIEX FF may be evaluated for:

• Intermediate purification

• Flow-through polishing

• Host-cell protein reduction

• DNA reduction

• Aggregate reduction

• Process impurity removal

The optimum mode should be determined according to antibody pI, buffer pH, conductivity and impurity profile.

Viral Vector and Virus Purification

Anion exchange chromatography can also be used in virus and viral-vector downstream processing.

Potential development applications include:

• Viral vector capture

• Viral vector polishing

• Virus purification

• Removal of host-cell impurities

• Nucleic acid reduction

• Separation of charged biological particles

Thermo Fisher includes viruses and viral vectors among current process-scale AEX purification applications.

Plasmid DNA and Nucleic Acid Purification

Because nucleic acids carry strong negative charge, Q-type anion exchange chromatography can also be evaluated for:

• Plasmid DNA purification

• DNA capture

• Nucleic acid fractionation

• Process impurity removal

• Biotechnology process development

The required buffer, conductivity and elution conditions should be optimized according to the nucleic acid sample.

General Q TopIEX FF Purification Workflow

1. Prepare the Column

Pack Q TopIEX FF into a suitable chromatography column.

2. Equilibrate

Equilibrate the resin with a low-conductivity buffer selected for the target molecule.

3. Prepare the Sample

Clarify and condition the sample to the required pH and conductivity.

4. Load the Sample

Apply the sample at the selected flow rate.

5. Wash the Column

Remove unbound and weakly interacting impurities.

6. Elute the Target

Increase salt concentration or adjust buffer conditions to recover the bound target.

7. Regenerate the Resin

Remove remaining bound material using a validated regeneration procedure.

8. Clean and Re-Equilibrate

Apply the validated cleaning procedure and re-equilibrate before the next cycle.

Factors Affecting Q FF Separation

Important method-development parameters include:

• Buffer pH

• Protein pI

• Conductivity

• Salt concentration

• Sample concentration

• Sample viscosity

• Loading amount

• Flow rate

• Column bed height

• Gradient slope

• Elution conditions

These parameters should be optimized for each biomolecule and purification process.

How to Select Buffer pH

For bind-and-elute anion exchange chromatography, the target protein generally needs to carry sufficient net negative charge to interact with the positively charged Q ligand.

A practical method-development strategy is to screen several buffer pH conditions and evaluate:

• Target binding

• Product recovery

• Impurity removal

• Selectivity

• Peak shape

• Column capacity

The final operating pH should be determined experimentally for the target molecule.

Salt Gradient Elution

Bound biomolecules can be separated by increasing salt concentration.

A typical method-development approach may use:

• Step elution

• Linear salt gradient

• Multi-step gradient

Salt ions compete with bound biomolecules for ionic interactions with the resin, enabling differential elution according to binding strength.

Q Strong Anion Exchanger vs. DEAE Weak Anion Exchanger

Q-type media are especially useful when a robust strong anion exchanger is preferred across process-development conditions.

Q TopIEX FF vs. High-Performance Fine-Particle Media

Q TopIEX FF is therefore positioned primarily for fast preparative and large-scale biomolecule purification.

Process Scale-Up

The Fast Flow platform is designed for scale-up from laboratory development to larger purification columns.

Important scale-up parameters include:

• Bed height

• Linear velocity

• Residence time

• Protein loading

• Pressure

• Buffer conductivity

• Gradient design

• Cleaning procedure

Maintaining comparable residence time and bed conditions can help transfer purification methods between column scales.

Cytiva specifically positions its 6% agarose Q Fast Flow platform for industrial downstream processing and straightforward scale-up.

Cleaning-in-Place and Resin Reuse

Reusable process chromatography requires validated cleaning and sanitization procedures.

Important considerations include:

• Target protein properties

• Feed impurities

• Cleaning reagent

• Contact time

• Column pressure

• Number of reuse cycles

• Binding performance after cleaning

Strong industrial anion exchange media are commonly designed around reusable packed-bed workflows with validated CIP procedures. Cytiva specifically highlights chemical stability and established CIP protocols for its Q Fast Flow resin.

Specific CIP conditions for Q TopIEX FF should follow SHBC product validation data.

Quality Control for Bulk Production

For process-scale chromatography media, important quality parameters include:

• Agarose concentration

• Particle-size consistency

• Bead morphology

• Crosslinking consistency

• Ion exchange functionality

• Packed-bed stability

• Pressure-flow behavior

• Binding performance

• Chromatographic selectivity

• Batch-to-batch consistency

• Storage stability

Why Choose SHBC Q TopIEX FF?

• 6% highly crosslinked agarose

• 90 μm average particle size

• Strong Q anion exchange chemistry

• Fast-flow process design

• Suitable for protein purification

• Suitable for biomolecule separation

• Suitable for capture and intermediate purification

• Suitable for process development

• Laboratory evaluation available

• Pilot and bulk supply available

• Large-scale manufacturing capability

• Custom packaging support

Frequently Asked Questions

What does Q mean in Q TopIEX FF?

Q refers to the quaternary ammonium functional group used as the strong anion exchange ligand.

What does FF mean?

FF means Fast Flow, indicating that the media are designed for high-throughput preparative and process chromatography.

What is the matrix of Q TopIEX FF?

Q TopIEX FF is based on highly crosslinked 6% agarose.

What is the average particle size?

The average particle size is 90 μm.

Is Q TopIEX FF a strong or weak anion exchanger?

It is a strong anion exchange chromatography medium.

What molecules can Q TopIEX FF purify?

It can be evaluated for proteins, enzymes, peptides, nucleic acids, plasmid DNA, viruses and other negatively charged biomolecules under suitable conditions.

Can Q TopIEX FF be used for monoclonal antibody purification?

Yes. It can be evaluated for intermediate and polishing steps in monoclonal antibody downstream processes.

Can it be used in flow-through mode?

Yes. Strong anion exchange media may be operated in flow-through mode when process conditions are designed so the product passes through while selected negatively charged impurities bind.

Can Q TopIEX FF remove DNA and host-cell proteins?

It may be evaluated for removal of negatively charged process impurities including DNA and certain host-cell proteins. Performance depends on process conditions and should be validated for each product.

Is Q TopIEX FF suitable for large-scale purification?

Yes. The 6% highly crosslinked agarose matrix and 90 μm Fast Flow format are designed for process-development and large-scale biomolecule purification.

What is the binding capacity?

Binding capacity depends on the test molecule, buffer conditions and operating method. Use Q TopIEX FF product-specific QC data rather than values from another commercial Q resin.

What is the recommended maximum flow rate?

Maximum operating flow depends on column geometry, bed height and process conditions. Use SHBC product-specific pressure-flow data when defining manufacturing conditions.

Can SHBC provide bulk quantities?

Yes. Shanghai SanYu Biotechnology Co., Ltd. supports laboratory evaluation, pilot-scale requirements and bulk supply of Q TopIEX FF chromatography media.

Request Q TopIEX FF Samples and Bulk Pricing

Contact Shanghai SanYu Biotechnology Co., Ltd. for Q TopIEX FF samples, technical information and bulk quotations.

Please provide:

• Target protein or biomolecule

• Feed material

• Purification mode

• Column dimensions

• Required resin volume

• Development or production scale

• Estimated annual demand

SHBC Q TopIEX FF is designed for research, process development and biomolecule purification applications.