40um Epoxy Magnetic Beads MEP40UM-10 5%

40 μm Epoxy Magnetic Beads MEP40UM-10

SHBC MEP40UM-10 Epoxy Magnetic Beads are 40 μm functional magnetic microspheres supplied at 5% solids.

The reactive epoxy surface is designed for covalent immobilization of antibodies, antigens, proteins, peptides, enzymes and other compatible ligands.

MEP40UM-10 is suitable for immunoassay development, magnetic separation, biomolecule capture and bulk reagent production.

MEP40UM-10 Technical Specifications

Epoxy Coupling Principle

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

This reaction forms a stable covalent bond between the ligand and the magnetic bead surface. Additional EDC/NHS activation is normally unnecessary because the surface already contains reactive epoxy groups.

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

Key Advantages of MEP40UM-10

• Reactive epoxy-functional surface

• 40 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 replacement

• Flexible custom surface modification

• Suitable for research and bulk production

Why Choose 40 μm Epoxy Magnetic Beads?

The 40 μm particle format is suitable for workflows requiring visible particle handling, convenient recovery and repeated magnetic washing.

Potential advantages include:

• Easy bead resuspension and collection

• Simple manual handling

• Reduced risk of bead loss during washing

• Suitable for larger magnetic solid phases

• Convenient process observation

• Scalable reagent preparation

Because 40 μm beads settle more quickly than smaller particles, continuous or periodic mixing is recommended during coupling and assay reactions.

Immunoassay Applications

Antibody-Coupled Magnetic Beads

Capture antibodies can be covalently immobilized on MEP40UM-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 Magnetic Workflows

MEP40UM-10 can be evaluated in:

• Magnetic washing instruments

• Liquid-handling platforms

• Custom immunoassay analyzers

• Batch magnetic separation

• High-throughput research workflows

Instrument compatibility should be confirmed because particle size requirements differ between automated platforms.

Protein and Biomolecule Applications

MEP40UM-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 surface can be evaluated for immobilizing:

• Monoclonal antibodies

• Polyclonal antibodies

• Recombinant proteins

• Antigens

• Peptides

• Enzymes

• Lectins

• Haptens

• Other compatible affinity ligands

Coupling efficiency depends on ligand purity, concentration, available 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 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 and assay 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 testing is recommended before bulk production.

Immunoassay Development Tips

• Use purified antibodies or antigens.

• Avoid unnecessary carrier proteins.

• Confirm buffer and preservative compatibility.

• Keep the 40 μm beads uniformly suspended.

• Optimize ligand loading for signal and background.

• Block residual epoxy groups after coupling.

• Evaluate nonspecific binding.

• Confirm magnetic collection performance.

• Test coupled-bead storage stability.

• Verify batch-to-batch assay consistency.

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, coupling process and final assay requirements.

MEP40UM-10 vs. Smaller Epoxy Magnetic Beads

Particle size should be selected according to ligand capacity, magnetic response, assay kinetics and instrument compatibility.

Why Choose SHBC MEP40UM-10?

• 40 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 support for product selection

Storage and Handling

Store MEP40UM-10 according to the product label and technical documentation.

Recommended practices:

• Keep the container tightly sealed.

• Mix thoroughly before use.

• Avoid freezing unless validated.

• Prevent microbial contamination.

• Use clean pipettes and containers.

• Resuspend settled beads before sampling.

• Review the SDS before use.

Frequently Asked Questions

What is MEP40UM-10?

MEP40UM-10 is a 40 μm epoxy-functional magnetic bead product supplied at 5% solids.

What biomolecules can be coupled?

The beads can be evaluated for 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 surface.

Can MEP40UM-10 be used for immunoassays?

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

Why do 40 μm beads require mixing?

Larger particles settle more quickly. 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 downstream reactions.

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 systems, but instrument compatibility and 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 MEP40UM-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

MEP40UM-10 is supplied for research and development. Final diagnostic applications must be validated by the customer.