20um Epoxy Magnetic Beads MEP20UM-10 | 5% Solids

20 μm Epoxy Magnetic Beads MEP20UM-10

SHBC MEP20UM-10 Epoxy Magnetic Beads are 20 μm functional magnetic microspheres supplied at 5% solids.

The reactive epoxy surface supports covalent immobilization of antibodies, antigens, proteins, peptides, enzymes and other compatible biomolecules.

MEP20UM-10 is designed for immunoassay development, magnetic separation, biomolecule capture and scalable reagent production.

MEP20UM-10 Technical Specifications

Epoxy Coupling Mechanism

Epoxy groups on the bead surface can react with compatible amino or sulfhydryl groups in proteins and other biomolecules.

This reaction creates stable covalent attachment between the ligand and magnetic bead surface. Additional EDC/NHS activation is normally unnecessary because the beads already contain reactive epoxy groups.

After coupling, the beads can be magnetically collected, washed and resuspended for downstream assays.

Key Advantages of MEP20UM-10

• Reactive epoxy-functional surface

• 20 μm particle size

• Supplied at 5% solids

• Direct covalent ligand immobilization

• Suitable for antibodies, antigens and proteins

• Strong ligand retention during washing

• Convenient magnetic collection

• Easy buffer exchange

• Flexible custom surface modification

• Suitable for research and bulk production

Why Choose 20 μm Epoxy Magnetic Beads?

The 20 μm particle format is suitable for workflows that prioritize straightforward particle handling, magnetic collection and repeated washing.

MEP20UM-10 can be evaluated for:

• Magnetic solid-phase immunoassays

• Large-particle assay systems

• Custom antibody-coated beads

• Custom antigen-coated beads

• Manual magnetic separation

• Automated magnetic washing

• Scalable reagent preparation

Coupling capacity and assay performance should be validated for the selected ligand and application.

Immunoassay Applications

Antibody-Coupled Magnetic Beads

Capture antibodies can be covalently immobilized on MEP20UM-10 for:

• Sandwich immunoassays

• Chemiluminescent immunoassays

• Fluorescent immunoassays

• Enzyme immunoassays

• Magnetic immunoassays

• Biomarker detection

• Pathogen-detection research

The magnetic solid phase simplifies target capture, washing and separation.

Antigen-Coupled Magnetic Beads

Antigens can be immobilized for:

• Antibody-detection assays

• Serological research

• Autoantibody assay development

• Infectious-disease research

• Assay calibration

• Method validation

Automated Immunoassay Workflows

MEP20UM-10 can be evaluated in:

• Automated chemiluminescence analyzers

• Magnetic washing instruments

• Liquid-handling platforms

• High-throughput assay systems

• Custom diagnostic reagent platforms

Protein and Biomolecule Applications

MEP20UM-10 may also be evaluated for:

• Immunoprecipitation

• Protein enrichment

• Protein-complex isolation

• Enzyme immobilization

• Affinity ligand preparation

• Biomolecule capture

• Biosensor development

• Custom magnetic purification

Suitable Coupling Molecules

The epoxy-functional surface can be evaluated with:

• Monoclonal antibodies

• Polyclonal antibodies

• Recombinant proteins

• Antigens

• Peptides

• Enzymes

• Lectins

• Haptens

• Other compatible affinity ligands

Final coupling efficiency depends on ligand purity, concentration, accessible functional groups and reaction conditions.

General Coupling Workflow

1. Resuspend the Beads

Mix the suspension thoroughly before sampling to obtain a uniform bead concentration.

2. Wash the Beads

Collect the beads with a magnetic separator and replace the storage solution with a suitable coupling buffer.

3. Add the Ligand

Add the purified antibody, antigen, protein or enzyme to the washed beads.

4. Perform Covalent Coupling

Incubate under optimized buffer, temperature and mixing conditions.

5. Block Residual Reactive Groups

Use a suitable blocking reagent to deactivate remaining epoxy groups.

6. Wash the Coupled Beads

Remove unbound biomolecules and reaction components through magnetic washing.

7. Resuspend and Evaluate

Resuspend the functionalized beads in the selected storage or assay buffer and evaluate performance.

Factors Affecting Coupling Efficiency

Important optimization factors include:

• Ligand purity

• Ligand concentration

• Bead-to-ligand ratio

• Coupling-buffer composition

• Buffer pH

• Ionic strength

• Reaction temperature

• Incubation time

• Mixing efficiency

• Blocking conditions

Small-scale optimization is recommended before bulk production.

Immunoassay Development Tips

• Use purified antibodies or antigens.

• Avoid unnecessary carrier proteins.

• Confirm preservative and buffer compatibility.

• Keep beads uniformly suspended during coupling.

• Optimize ligand loading for signal and background.

• Block residual epoxy groups after coupling.

• Evaluate nonspecific binding.

• Confirm magnetic separation efficiency.

• Test coupled-bead storage stability.

• Verify batch-to-batch assay performance.

Quality Control for Bulk Production

For research-to-production scale-up, evaluate:

• Particle-size consistency

• Suspension uniformity

• Solid-content consistency

• Magnetic collection performance

• Coupling efficiency

• Ligand loading

• Nonspecific binding

• Signal-to-background ratio

• Assay sensitivity

• Storage stability

• Batch reproducibility

Epoxy vs. Carboxyl Magnetic Beads

The preferred chemistry depends on the ligand, required orientation, coupling conditions and final assay performance.

Why Choose SHBC MEP20UM-10?

• 20 μm epoxy-functional magnetic beads

• 5% solid-content suspension

• Suitable for immunoassay development

• Flexible antibody and antigen coupling

• Research and manufacturing quantities

• Sample evaluation support

• Stable batch supply

• Bulk production capability

• Custom packaging options

• Technical communication for product selection

Storage and Handling

Store MEP20UM-10 according to the product label and technical documentation.

Recommended handling practices:

• Keep the container tightly sealed.

• Mix thoroughly before use.

• Avoid freezing unless validated.

• Prevent microbial contamination.

• Use clean pipettes and containers.

• Avoid prolonged magnetic collection during storage.

• Review the SDS before use.

Frequently Asked Questions

What is MEP20UM-10?

MEP20UM-10 is a 20 μm epoxy-functional magnetic bead suspension supplied at 5% solids.

What biomolecules can be coupled?

The beads can be evaluated for coupling antibodies, antigens, proteins, peptides, enzymes and other compatible ligands.

Is EDC/NHS activation required?

No. The surface already contains reactive epoxy groups, so EDC/NHS activation is not normally required.

Can antibodies be coupled directly?

Yes. Compatible functional groups on purified antibodies can react with the epoxy-functional surface.

Can MEP20UM-10 be used for immunoassays?

Yes. It can be evaluated as a magnetic solid phase for antibody, antigen and biomarker-detection assays.

Why should residual epoxy groups be blocked?

Blocking deactivates unreacted surface groups and helps reduce unwanted reactions during downstream use.

Can the beads be used for protein purification?

Yes. After coupling a suitable affinity ligand, the beads can be evaluated for protein capture, enrichment and purification.

Are the beads suitable for automated systems?

The magnetic format can be evaluated in automated separation, washing and liquid-handling workflows.

Is coupling optimization necessary?

Yes. Ligand loading, buffer, pH, temperature, reaction time and blocking conditions should be optimized for each project.

Can SHBC supply bulk quantities?

Yes. SHBC supports sample evaluation, research supply and bulk production for immunoassay developers and reagent manufacturers.

Request MEP20UM-10 Samples

Contact Shanghai SanYu Biotechnology Co., Ltd. for MEP20UM-10 samples, technical documentation and bulk quotations.

Please provide:

• Target antibody or antigen

• Immunoassay format

• Coupling scale

• Required bead quantity

• Current coupling method

• Target application

• Estimated annual demand

MEP20UM-10 is supplied for research and development. Final diagnostic applications must be validated by the customer.