300 Amino Magnetic Beads MNH300-10 5%

300nm Amino Magnetic Beads MNH300NM-10

SHBC MNH300NM-10 Amino Magnetic Beads are 300nm magnetic microspheres with reactive amino groups on the particle surface. Supplied at a solids content of 5%, these beads are developed for antibody, antigen, protein, peptide and enzyme immobilization in immunoassay reagent research and manufacturing.

The amino-functional surface provides multiple options for covalent biomolecule coupling through suitable crosslinkers or activated carboxyl chemistry. The 300nm particle format offers a useful balance between available surface area, suspension behavior and magnetic handling, making MNH300NM-10 suitable for the development of magnetic immunoassay reagents and particle-based bioassays.

The product is available for laboratory evaluation, process optimization, pilot-scale development and bulk production projects.

Product Overview

MNH300NM-10 is designed for biotechnology companies, diagnostic reagent developers, research institutions and immunoassay manufacturers requiring amino-functional magnetic particles with a defined nanoscale particle size.

The surface amino groups can be used as reactive sites for immobilizing antibodies and other biomolecules. After coupling, the functionalized beads can serve as a magnetic solid phase for target capture, separation, washing and signal detection.

Compared with larger magnetic microspheres, 300nm particles can provide a greater available surface area per unit mass. This can be useful when developing assays that require high ligand loading, efficient analyte capture or increased interaction between the magnetic carrier and the sample.

Actual coupling efficiency, magnetic separation time, assay background and analytical sensitivity should be optimized according to the selected ligand, buffer system, crosslinking chemistry, magnetic separator and assay platform.

Key Specifications

Product specifications should be confirmed using the corresponding technical data sheet, certificate of analysis or lot-specific documentation.

Why Choose 300nm Amino Magnetic Beads?

High Available Surface Area

The nanoscale particle size provides a relatively large surface area for biomolecule immobilization. This can support the development of magnetic carriers requiring sufficient antibody, antigen or protein loading.

Reactive Amino Surface

The surface amino groups offer flexible routes for covalent ligand immobilization. Developers can select an appropriate crosslinking strategy according to the structure and stability of the target biomolecule.

Suitable for Magnetic Immunoassay Development

After biomolecule coupling, the magnetic beads can be used as a solid-phase carrier for target capture, magnetic separation, washing and downstream signal detection.

5% Solids Content

The 5% solids formulation provides a concentrated starting material for assay development. It allows researchers to dilute the beads to different working concentrations according to coupling requirements, assay format and instrument conditions.

Scalable for Production Projects

MNH300NM-10 can support projects progressing from initial feasibility testing to pilot production and larger-volume reagent manufacturing.

Amino Surface Chemistry and Biomolecule Coupling

The surface of MNH300NM-10 contains amino functional groups that can participate in covalent immobilization reactions. The most suitable chemistry depends on the available functional groups of the ligand and the required orientation, stability and biological activity.

Common development routes may include:

Glutaraldehyde-Mediated Coupling

Glutaraldehyde can be used as a bifunctional crosslinker to activate amino-functional magnetic beads before reaction with amino-containing proteins or antibodies.

This route is widely considered during the development of amino bead conjugates, but crosslinker concentration, reaction time and blocking conditions must be optimized to reduce excessive crosslinking and preserve ligand activity.

Activated Carboxyl Coupling

Carboxyl groups on proteins, peptides or other molecules may be activated using suitable carbodiimide chemistry before reaction with amino groups on the magnetic bead surface.

The coupling buffer should be selected carefully because compounds containing primary amines may compete with the bead surface during the reaction.

Heterobifunctional Crosslinkers

A heterobifunctional crosslinker may be selected when more controlled coupling or specific ligand orientation is required. Different crosslinkers can provide amine-reactive, sulfhydryl-reactive or other functional ends.

Aldehyde-Containing Ligands

Aldehyde-modified biomolecules may react with surface amino groups under suitable conditions. A reduction step may be introduced when a more stable covalent linkage is required.

Because antibodies and proteins differ in molecular weight, isoelectric point, structure and stability, coupling conditions should be optimized individually for each ligand.

Applications in Immunoassay Reagent Development

MNH300NM-10 can be evaluated as a functional magnetic carrier in a variety of research and reagent-development workflows.

Magnetic Immunoassays

Antibody-coupled amino magnetic beads can be used to capture antigens from biological samples. Magnetic separation allows the captured complexes to be isolated from unbound sample components before detection.

Chemiluminescence Immunoassay Development

The beads may be evaluated as a magnetic solid phase in chemiluminescent immunoassay development. Developers should verify bead background, washing efficiency, magnetic collection, conjugate stability and compatibility with the selected chemiluminescent substrate.

Electrochemiluminescence Immunoassay Development

MNH300NM-10 may also be evaluated in electrochemiluminescence-related assay development where a magnetic carrier is required. Compatibility with the instrument, electrode system, signal label and assay buffer must be confirmed by the reagent developer.

Antibody Immobilization

The amino surface can be used to prepare antibody-coupled magnetic particles for antigen capture, assay calibration, method development and reagent manufacturing.

Antigen Immobilization

Antigens can be immobilized on the bead surface for antibody detection, assay screening, reagent evaluation and serological research.

Protein and Enzyme Immobilization

Proteins, enzymes and peptides may be conjugated to the beads for affinity capture, biosensor research, catalytic studies or particle-based analytical methods.

Immunomagnetic Separation

Functionalized beads can be used to enrich or separate target analytes before downstream detection. Potential targets include proteins, cells, microorganisms and other biomolecules, depending on the immobilized ligand.

Particle-Based Biosensor Development

The 300nm magnetic carrier can be integrated into research involving optical, electrochemical, magnetic or microfluidic biosensing systems after application-specific validation.

Benefits for Immunoassay Manufacturers

Flexible Ligand Selection

The amino-functional surface can support the immobilization of antibodies, antigens, enzymes, peptides and other biomolecules through an appropriate coupling strategy.

Adjustable Bead Working Concentration

The 5% solids content allows developers to prepare multiple bead concentrations during coupling optimization and assay screening.

Suitable for Assay Optimization

Researchers can evaluate the influence of bead dosage, coupling density, blocking buffer, washing conditions and reaction time on assay sensitivity and background.

Magnetic Solid-Phase Handling

Magnetic separation can simplify washing, buffer exchange and target enrichment compared with conventional centrifugation-dependent workflows.

Research-to-Production Supply

The product can support early-stage method development, pilot validation and commercial-scale raw-material procurement.

Customization Support

Particle size, solids content, surface amino density, suspension medium, packaging volume and other parameters may be evaluated for customized projects.

Recommended Coupling and Assay Development Workflow

The following workflow is provided as a general development reference. Specific reaction conditions should be established through experimental optimization.

1. Disperse the Magnetic Beads

Mix the bead suspension thoroughly before sampling. Gentle vortexing, rolling or controlled sonication may be used according to the dispersion condition.

Avoid excessive foaming or prolonged high-energy sonication that may affect the particle suspension or surface functionality.

2. Wash or Exchange the Storage Buffer

Use a magnetic separator to collect the beads and remove the original suspension medium when necessary.

Wash the beads with a coupling-compatible buffer selected according to the crosslinking chemistry.

3. Select the Coupling Method

Choose glutaraldehyde-mediated coupling, activated carboxyl coupling or another appropriate reaction based on the available functional groups of the ligand.

Avoid buffers containing substances that interfere with the selected reaction.

4. Optimize Ligand Input

Evaluate multiple ligand-to-bead ratios rather than relying on a single coupling concentration.

Excessive ligand loading may increase reagent cost, steric hindrance or non-specific adsorption without improving assay performance.

5. Perform the Coupling Reaction

Maintain controlled mixing to keep the beads suspended and provide consistent contact between the bead surface and the ligand.

Reaction time, temperature, pH and crosslinker concentration should be optimized for the specific antibody or protein.

6. Block Residual Reactive Sites

After coupling, use an appropriate blocking reagent to reduce remaining reactive groups and non-specific interactions.

Blocking reagent selection must consider downstream assay compatibility.

7. Wash the Coupled Beads

Perform sufficient magnetic washing to remove unbound ligand, residual crosslinker and blocking components.

8. Resuspend in Storage Buffer

Resuspend the coupled beads in a buffer suitable for the intended assay. Stabilizers, surfactants, preservatives and proteins may be screened according to the application.

9. Evaluate Coupling and Assay Performance

Recommended evaluation items include:

• Coupling efficiency

• Ligand activity after immobilization

• Magnetic separation behavior

• Suspension stability

• Non-specific binding

• Signal-to-background ratio

• Analytical sensitivity

• Precision and repeatability

• Accelerated and real-time stability

Quality Control for Research and Batch Production

For immunoassay reagent manufacturing, the magnetic bead raw material should be evaluated using both physical characterization and functional testing.

Recommended incoming or development-stage tests include:

Particle Size

Confirm that the particle size distribution remains suitable for the selected assay and magnetic handling system.

Solids Content

Verify bead concentration before calculating coupling ratios and working concentrations.

Dispersion Quality

Inspect the suspension for visible aggregation, sedimentation behavior and redispersion performance.

Magnetic Response

Confirm that the particles can be collected and redispersed under the magnetic conditions used in the assay platform.

Surface Reactivity

Evaluate coupling performance using a representative antibody, protein or model ligand.

Non-Specific Binding

Test the blocked and coupled beads with negative samples, blank controls and potentially interfering substances.

Assay Performance

The final acceptance criteria should be based on the performance of the complete immunoassay reagent, rather than bead characterization alone.

For production-scale projects, users should establish lot-release specifications covering critical physical and functional parameters.

Customization and Bulk Supply

SHBC supports magnetic bead projects for research institutions, biotechnology companies, diagnostic reagent developers and manufacturing enterprises.

Available customization options may include:

• Alternative particle sizes

• Customized solids content

• Adjusted amino surface density

• Customized suspension buffer

• Preservative selection

• Special packaging volumes

• Sample and pilot-scale supply

• Bulk production supply

• Customer-specific quality requirements

• OEM and private-label packaging

Customization feasibility depends on target specifications, order volume, application requirements and validation standards.

For bulk projects, customers are encouraged to provide information about the intended application, annual demand, assay platform, coupling target and required packaging format.

Storage and Handling Recommendations

Store MNH300NM-10 according to the conditions stated on the product label, technical data sheet or certificate of analysis.

General handling recommendations include:

• Mix the suspension thoroughly before use.

• Avoid allowing the beads to dry during washing or coupling.

• Use clean laboratory consumables to prevent contamination.

• Avoid repeated freezing and thawing unless specifically approved.

• Confirm buffer compatibility before changing the suspension medium.

• Use calibrated pipettes when transferring concentrated bead suspensions.

• Maintain consistent mixing during scale-up to prevent uneven sampling.

• Record lot numbers and preparation conditions during assay development.

The storage stability of antibody-coupled beads depends on the ligand, coupling chemistry, buffer composition, preservative and storage temperature. Stability should be established for each finished reagent.

Frequently Asked Questions

What is MNH300NM-10?

MNH300NM-10 is a 300nm amino-functional magnetic bead suspension with 5% solids content. It is developed for biomolecule coupling and immunoassay reagent research, optimization and production.

What functional group is present on the bead surface?

The surface contains amino groups, also written as NH2 groups. These groups provide reactive sites for covalent biomolecule immobilization through suitable coupling chemistry.

What biomolecules can be coupled to the beads?

Potential coupling targets include antibodies, antigens, proteins, peptides and enzymes. The appropriate crosslinker and reaction conditions depend on the functional groups and stability of the ligand.

Why choose a 300nm particle size?

A 300nm magnetic bead provides a nanoscale surface that can support biomolecule immobilization while remaining suitable for magnetic separation. The particle size may be useful when the assay requires a relatively high available surface area and stable suspension behavior.

What does 5% solids content mean?

A 5% solids content indicates that the supplied suspension contains a concentrated amount of magnetic particles. The product can be diluted to the required working concentration during coupling or assay development.

Can MNH300NM-10 be used for antibody coupling?

Yes. The amino-functional surface can be used for antibody immobilization through an appropriate crosslinking method. Coupling efficiency and retained antibody activity should be evaluated during process development.

Is the product suitable for chemiluminescence immunoassays?

The product can be evaluated as a magnetic solid-phase carrier in chemiluminescence immunoassay development. Compatibility with the detection chemistry, instrument, washing process and assay formulation must be validated by the developer.

Can it be used for electrochemiluminescence assays?

MNH300NM-10 may be evaluated in electrochemiluminescence immunoassay research. Developers should confirm compatibility with the selected electrode, label chemistry, magnetic collection system and signal-detection protocol.

Does a higher coupling amount always produce a better assay signal?

No. Excessive ligand density can create steric hindrance, reduce biological activity or increase non-specific binding. Multiple ligand-to-bead ratios should be compared during optimization.

Can the product be used directly in a diagnostic kit?

MNH300NM-10 is supplied as a raw material for research and reagent development. The customer is responsible for validating the coupled beads, finished reagent, manufacturing process and regulatory compliance for the intended diagnostic application.

Are customized particle sizes available?

Customized particle size, solids content, surface functionality, buffer and packaging may be evaluated according to project requirements and order volume.

Can SHBC provide bulk quantities?

Sample, pilot and bulk supply can be discussed according to the customer’s development stage, annual usage and packaging requirements.

Request Samples or Bulk Pricing

Contact SHBC to request evaluation samples, technical information or bulk pricing for MNH300NM-10 300nm Amino Magnetic Beads.

To help us recommend the appropriate product and supply plan, please provide:

• Intended immunoassay application

• Target biomolecule for coupling

• Required bead concentration

• Estimated sample or bulk quantity

• Preferred packaging volume

• Expected annual demand

• Required technical or quality documents

• Target development and production schedule

SHBC provides amino magnetic bead solutions for immunoassay research, reagent optimization, pilot production and large-scale manufacturing.