50um Epoxy Magnetic Beads MEP50UM-10 5% Solids

50 μm Epoxy Magnetic Beads MEP50UM-10

SHBC MEP50UM-10 Epoxy Magnetic Beads are 50 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.

MEP50UM-10 is designed for immunoassay development, magnetic separation, biomolecule capture and scalable reagent production.

MEP50UM-10 Technical Specifications

Epoxy Coupling Principle

Epoxy groups on the magnetic bead surface can react with compatible amino or sulfhydryl groups in antibodies, proteins, peptides and enzymes.

This reaction forms a stable covalent attachment between the selected ligand and the magnetic solid phase. Additional EDC/NHS activation is normally unnecessary because reactive epoxy groups are already present on the bead surface.

After coupling, the beads can be magnetically collected, washed and resuspended for immunoassay or separation workflows.

Key Advantages of MEP50UM-10

• Reactive epoxy-functional surface

• 50 μm particle size

• Supplied at 5% solids

• Direct covalent ligand immobilization

• Suitable for antibodies, antigens and proteins

• Convenient magnetic collection

• Easy washing and buffer exchange

• Stable ligand retention

• Flexible custom functionalization

• Suitable for research and bulk production

Why Choose 50 μm Epoxy Magnetic Beads?

The 50 μm particle format is suitable for workflows that prioritize convenient particle handling, rapid settling and straightforward magnetic recovery.

Potential advantages include:

• Easy manual bead handling

• Convenient magnetic collection

• Reduced bead loss during washing

• Clear observation of separation

• Suitable for large-particle solid phases

• Easy recovery from larger reaction volumes

• Scalable batch processing

Because 50 μm beads settle faster than smaller particles, regular mixing is recommended during coupling and assay reactions.

Immunoassay Applications

Antibody-Coupled Magnetic Beads

Capture antibodies can be immobilized on MEP50UM-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 covalently immobilized for:

• Antibody-detection assays

• Serological research

• Autoantibody assay development

• Infectious-disease research

• Assay calibration

• Method validation

Automated Magnetic Workflows

MEP50UM-10 can be evaluated in:

• Magnetic washing instruments

• Liquid-handling platforms

• Batch magnetic separators

• Custom immunoassay analyzers

• High-throughput research workflows

Instrument compatibility should be confirmed because different systems may have specific particle-size requirements.

Protein and Biomolecule Applications

MEP50UM-10 may also be evaluated for:

• Immunoprecipitation

• Protein enrichment

• Affinity purification

• Enzyme immobilization

• Protein-complex isolation

• Biomolecule capture

• Biosensor development

• Custom magnetic purification

Epoxy magnetic beads are commercially used for antibody and protein coupling, immunoassays, immunoprecipitation and other applications requiring an active biomolecule on a magnetic support.

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 performance depends on ligand purity, concentration, accessible functional groups and reaction conditions.

General Coupling Workflow

1. Resuspend the Beads

Mix the bead suspension thoroughly before sampling.

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 Epoxy Groups

Use a suitable blocking reagent to deactivate remaining reactive groups.

6. Wash the Coupled Beads

Remove unbound ligands and reaction components through repeated magnetic washing.

7. Resuspend and Evaluate

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

Factors Affecting Coupling Efficiency

Important factors include:

• Ligand purity

• Ligand concentration

• Bead-to-ligand ratio

• 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 buffer and preservative compatibility.

• Keep the 50 μm beads uniformly suspended.

• Optimize ligand loading for signal and background.

• Block residual epoxy groups after coupling.

• Evaluate nonspecific binding.

• Confirm magnetic collection efficiency.

• Test coupled-bead storage stability.

• Verify batch-to-batch assay consistency.

MEP50UM-10 vs. Smaller Epoxy Magnetic Beads

Particle size should be selected according to ligand capacity, reaction kinetics, mixing method and instrument compatibility.

Epoxy vs. Carboxyl Magnetic Beads

The preferred surface chemistry depends on the ligand and final assay requirements.

Quality Control for Bulk Production

Recommended evaluation items include:

• 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

Why Choose SHBC MEP50UM-10?

• 50 μm epoxy-functional magnetic beads

• 5% solid-content suspension

• Suitable for immunoassay development

• Flexible antibody and antigen coupling

• Sample evaluation support

• Stable batch supply

• Bulk manufacturing capability

• Custom packaging options

• Research and production quantities

• Technical support for product selection

Storage and Handling

Store MEP50UM-10 according to the product label and technical documentation.

Recommended practices:

• Keep the container tightly sealed.

• Mix thoroughly before sampling.

• Resuspend settled beads before use.

• Avoid freezing unless validated.

• Prevent microbial contamination.

• Use clean pipettes and containers.

• Review the SDS before use.

Frequently Asked Questions

What is MEP50UM-10?

MEP50UM-10 is a 50 μm epoxy-functional magnetic bead product 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 bead surface already contains reactive epoxy groups, so EDC/NHS activation is not normally required.

Can antibodies be coupled directly?

Yes. Compatible amino or sulfhydryl groups on purified antibodies can react with the epoxy surface.

Can MEP50UM-10 be used for immunoassays?

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

Why must the beads remain mixed?

The 50 μm beads settle relatively quickly. Regular mixing maintains uniform bead distribution and consistent ligand contact.

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 an appropriate affinity ligand, the beads can be evaluated for protein capture, enrichment and purification.

Are the beads suitable for automated instruments?

They can be evaluated in automated magnetic workflows, but instrument particle-size limits should be confirmed.

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 MEP50UM-10 Samples

Contact Shanghai SanYu Biotechnology Co., Ltd. for 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

MEP50UM-10 is supplied for research and development. Final diagnostic applications must be validated by the customer.