Top 10 Silica Magnetic Bead Manufacturers Serving Korea in 2026

Silica Magnetic Bead Market Overview in Korea

Silica magnetic beads are functional magnetic particles used to extract, purify and concentrate DNA and RNA from biological samples.

A typical silica magnetic bead contains a magnetic core or magnetic composite structure surrounded by a silica, silanol or silica-like surface. Under suitable chemical conditions, nucleic acids bind to the bead surface. An external magnetic field then collects the beads while proteins, salts, detergents, lipids, cellular debris and other contaminants are removed.

Silica magnetic beads are widely used for:

• Genomic DNA extraction;

• Total RNA purification;

• Viral DNA and RNA extraction;

• Plasmid DNA isolation;

• Microbial nucleic acid purification;

• Plant DNA and RNA extraction;

• PCR product cleanup;

• Sequencing reaction cleanup;

• Cell-free DNA extraction;

• NGS sample preparation;

• Molecular diagnostic reagent manufacturing;

• Automated nucleic acid extraction.

South Korea has a highly developed healthcare, biotechnology and diagnostic-manufacturing ecosystem. Market research estimates that the country’s IVD market continues to grow, supported by advanced healthcare infrastructure, molecular diagnostics, chronic-disease testing and diagnostic technology development.

Unlike some regional markets that rely almost entirely on imported raw magnetic particles, Korea has domestic companies with their own magnetic-bead technology.

Bioneer, headquartered in the Republic of Korea, manufactures AccuBead and AccuNanoBead silica-coated magnetic particles. The company publicly lists micrometre-scale particles from approximately 1–5 μm and nanometre-scale particles at approximately 200 nm and 400 nm.

This guide compares ten silica magnetic bead manufacturers and specialist suppliers serving Korean laboratories, IVD companies, biotechnology businesses and automated extraction system developers in 2026:

1. Bioneer;

2. SANYU;

3. Thermo Fisher Scientific;

4. Cytiva;

5. Merck MagPrep;

6. QIAGEN;

7. Promega;

8. Magtivio;

9. chemicell;

10. G-Biosciences.

The ranking includes both Korean and international suppliers.

SANYU is the only China-based manufacturer included. Other Chinese manufacturers have been excluded.

The positions represent an editorial comparison based on publicly available product information reviewed in 2026. They are not based on audited Korean revenue, verified market share or independent head-to-head laboratory testing.

Korean buyers should confirm current product availability, distributor authorization, import status, delivery time and commercial supply conditions directly with each manufacturer.

Quick Answer: Leading Manufacturers Serving Korea

The leading silica magnetic bead manufacturers and nucleic acid purification technology suppliers serving Korea in 2026 include Bioneer, SANYU, Thermo Fisher Scientific, Cytiva, Merck, QIAGEN, Promega, Magtivio, chemicell and G-Biosciences.

Bioneer ranks first because it is a Korean manufacturer offering silica-coated magnetic beads in nanometre and micrometre sizes, together with local technical and commercial access.

SANYU ranks second because it supplies standalone silica magnetic beads across a broad particle-size range and supports customized concentration, surface properties, packaging and OEM manufacturing.

The best supplier depends on:

• Target nucleic acid;

• Sample matrix;

• Input volume;

• Extraction instrument;

• Binding-buffer chemistry;

• Required documentation;

• Commercial volume;

• Localization strategy.

What Are Silica Magnetic Beads?

Silica magnetic beads are paramagnetic or superparamagnetic particles with an external silica-based surface.

A typical particle may include:

1. An iron oxide magnetic core;

2. A polymer or inorganic support layer;

3. A silica coating;

4. Surface silanol groups;

5. A stabilizing suspension buffer.

The magnetic component allows the particles to be collected without repeated centrifugation.

The silica surface enables reversible DNA or RNA binding under suitable salt, alcohol and pH conditions.

How Silica Magnetic Beads Extract DNA and RNA

A typical extraction workflow includes five stages.

1. Sample Lysis

Cells, bacteria, viruses, tissues or other biological materials are disrupted to release nucleic acids.

Lysis formulations may contain:

• Chaotropic salts;

• Detergents;

• Proteinase K;

• Reducing agents;

• RNase inhibitors;

• Carrier RNA.

2. Nucleic Acid Binding

The magnetic beads are mixed with the lysate and binding buffer.

Chaotropic salts and alcohol are commonly used to promote DNA or RNA adsorption onto the silica surface.

QIAGEN describes its MagAttract system as a silica-based purification process in which DNA binds to the magnetic particle surface in the presence of chaotropic salt, followed by washing and elution.

3. Magnetic Collection

A magnetic rack, plate magnet or magnetic rod collects the beads against the wall of a tube, well or disposable cartridge.

The surrounding liquid is removed while the nucleic acid remains bound to the particles.

4. Washing

The bead–nucleic acid complex is washed to remove:

• Proteins;

• Lipids;

• Salts;

• Detergents;

• Enzymes;

• Cellular debris;

• PCR inhibitors;

• Residual sample components.

5. Elution

Water or a low-salt buffer releases the purified DNA or RNA from the silica surface.

Extraction performance depends on the entire workflow rather than the magnetic bead alone.

Important variables include:

• Particle diameter;

• Silica coating;

• Lysis chemistry;

• Chaotropic salt;

• Alcohol concentration;

• Binding pH;

• Mixing intensity;

• Magnetic separator;

• Wash formulation;

• Drying time;

• Elution pH;

• Elution temperature.

Changing bead suppliers normally requires protocol optimization and bridging studies rather than a direct one-to-one substitution.

How We Selected the Top 10 Manufacturers

The manufacturers were evaluated according to criteria relevant to Korean molecular diagnostic developers, IVD manufacturers, biotechnology laboratories and extraction instrument companies.

Documented Silica-Based Technology

Each selected company publicly offers at least one of the following:

• Silica-coated magnetic beads;

• Silane magnetic beads;

• Silica-like magnetic particles;

• Silanol-functionalized particles;

• Magnetic silica extraction reagents;

• Silica-based magnetic purification platforms.

Standalone Bead Availability

Priority was given to companies that provide particles separately from a complete extraction kit.

Standalone beads allow developers to:

• Formulate proprietary buffers;

• Integrate beads into existing equipment;

• Optimize extraction cost;

• Manufacture private-label kits;

• Establish secondary raw-material sources;

• Fill and package reagents locally.

Nucleic Acid Extraction Relevance

The comparison considered support for:

• Genomic DNA;

• Total RNA;

• Viral nucleic acids;

• Plasmid DNA;

• Microbial DNA;

• High-molecular-weight DNA;

• PCR cleanup;

• Cell-free DNA;

• NGS sample preparation;

• Automated extraction.

Automation Compatibility

Important factors included:

• Magnetic collection speed;

• Sedimentation behavior;

• Dispensing consistency;

• Redispersibility;

• Magnetic rod compatibility;

• Microplate compatibility;

• Bead carryover;

• Availability of commercial-volume packages.

Customization and OEM Capability

Additional consideration was given to manufacturers supporting customization of:

• Particle diameter;

• Particle-size distribution;

• Silica surface properties;

• Solids concentration;

• Storage buffer;

• Preservative;

• Packaging;

• Pre-filled plates;

• OEM labeling.

Quality and Commercial Supply

The comparison also considered:

• Product specifications;

• Certificates of Analysis;

• Safety Data Sheets;

• Batch traceability;

• Quality certifications;

• Commercial production capacity;

• Bulk supply;

• Change-control procedures;

• Technical support.

Quick Comparison of the Top 10 Manufacturers

1. Bioneer

Bioneer is a Korea-based biotechnology manufacturer offering silica-coated magnetic particles for nucleic acid purification and other biomolecule-separation applications.

Its silica-coated magnetic beads contain high-density silicon dioxide on a magnetite surface. Bioneer explains that the hydroxyl groups on the silica surface interact with nucleic acids under chaotropic binding conditions, allowing DNA and RNA to be separated magnetically.

Main Products

Bioneer provides:

• AccuBead Silica-Coated Magnetic Beads;

• AccuNanoBead Silica-Coated Magnetic Beads;

• Micrometre-sized particles from approximately 1–5 μm;

• Nanometre-sized particles at approximately 200 nm;

• Nanometre-sized particles at approximately 400 nm;

• Functionalized silica magnetic particles;

• Magnetic separation racks.

Bioneer states that its magnetic particles use a pure magnetite core. Its micrometre-scale particles are marketed under the AccuBead name, while nanometre-scale particles are marketed as AccuNanoBead.

Main Applications

Bioneer silica magnetic beads can be evaluated for:

• Genomic DNA extraction;

• Total RNA extraction;

• Viral nucleic acid purification;

• Plasmid DNA purification;

• PCR cleanup;

• Biomolecule isolation;

• Manual magnetic separation;

• Automated extraction development.

Key Strengths

• Korean manufacturer;

• Local commercial and technical access;

• Nano- and micrometre particle formats;

• High-density silica coating;

• Pure magnetite core;

• Multiple functionalized bead options;

• Magnetic racks and workflow accessories;

• Reduced international import complexity for Korean buyers.

Best Suited For

Bioneer is especially suitable for:

• Korean diagnostic reagent manufacturers;

• Local biotechnology laboratories;

• Korean extraction instrument developers;

• Research institutes;

• Companies prioritizing domestic sourcing;

• Projects requiring both nano- and micrometre particles.

Considerations for Buyers

Korean buyers should still request:

• Lot-specific particle-size data;

• Particle-size distribution;

• Solids concentration;

• Binding-capacity data;

• Magnetic collection time;

• Bead carryover results;

• Product stability;

• Commercial batch size;

• Change-control procedures.

A local manufacturer may simplify communication and logistics, but the selected bead must still be qualified in the customer’s complete extraction workflow.

2. SANYU

SANYU is a specialized manufacturer of functional microspheres and magnetic beads for nucleic acid extraction, molecular diagnostics, IVD development and bioseparation.

SANYU is the only China-based manufacturer included in this ranking.

The company supplies silica magnetic beads across a broad nominal particle-size range and supports customization of size, solids concentration, surface modification, suspension formulation and packaging.

Main Product Capabilities

SANYU publicly lists silica magnetic bead sizes including:

• 100 nm;

• 200 nm;

• 800 nm;

• 1 μm;

• 2 μm;

• 5 μm;

• 10 μm;

• 20 μm;

• 30 μm;

• 50 μm;

• 100 μm;

• 200 μm.

The AMS200-10 product has a nominal diameter of 200 nm, a 5% solids concentration and package options including 10 mL, 15 mL, 20 mL, 100 mL and 1,000 mL.

Main Applications

SANYU silica magnetic beads can be evaluated for:

• Genomic DNA extraction;

• Total RNA purification;

• Viral DNA and RNA extraction;

• Plasmid DNA purification;

• Microbial nucleic acid extraction;

• Plant DNA and RNA extraction;

• Molecular diagnostic reagents;

• PCR sample preparation;

• NGS workflows;

• Magnetic rod extraction systems;

• Liquid-handling workstations;

• OEM extraction kits.

Customization Capability

Potential customization includes:

• Particle diameter;

• Particle-size distribution;

• Silica surface modification;

• Magnetic response;

• Solids concentration;

• Suspension stability;

• Storage buffer;

• Preservative;

• Package volume;

• OEM and private-label presentation.

Key Strengths

• Broad nominal size range;

• Direct raw-material supply;

• Flexible sample quantities;

• Custom solids concentration;

• Bulk commercial packaging;

• OEM and ODM capability;

• Manual and automated workflow compatibility;

• Support for proprietary buffer systems.

Best Suited For

SANYU may be particularly suitable for:

• Korean extraction reagent manufacturers;

• Automated extractor developers;

• OEM and private-label projects;

• Companies requiring nonstandard bead sizes;

• Companies developing proprietary buffers;

• Buyers seeking a customized secondary source;

• Commercial projects requiring bulk raw beads.

Considerations for Korean Buyers

Before approval, Korean customers should request:

• Lot-specific particle-size data;

• Size-distribution data;

• Silica coating information;

• Solids concentration;

• Magnetic response;

• DNA and RNA recovery data;

• Bead carryover results;

• Certificate of Analysis;

• Technical Data Sheet;

• Safety Data Sheet;

• Shelf-life information;

• Change-control policy;

• Manufacturing lead time;

• Shipping conditions.

SANYU states that AMS200-10 should be stored at 2–8°C and should not be frozen. It also offers COA, TDS, SDS and product specifications.

Because SANYU is a non-Korean supplier, buyers should also confirm:

• Korean importer responsibility;

• Customs documentation;

• Current delivery time;

• Local distributor support;

• Safety-stock requirements;

• Korean-language labeling needs;

• Complaint-investigation procedures.

3. Thermo Fisher Scientific

Thermo Fisher Scientific supplies Dynabeads magnetic separation products and supports commercial OEM programs.

Dynabeads are uniform, spherical and superparamagnetic particles used for the isolation and purification of biological materials.

Dynabeads MyOne Silane is a silica-like magnetic particle commonly evaluated for nucleic acid extraction.

Main Products and Services

Relevant options include:

• Dynabeads MyOne Silane;

• Viral nucleic acid extraction systems;

• Genomic DNA extraction workflows;

• Customized Dynabeads;

• Bulk OEM formats;

• Magnetic separation equipment.

Main Applications

Dynabeads MyOne Silane can be evaluated for:

• Genomic DNA extraction;

• Viral DNA extraction;

• Viral RNA extraction;

• Total nucleic acid purification;

• Serum and plasma;

• Whole blood;

• Automated molecular diagnostic workflows;

• Low-copy target recovery.

Key Strengths

• Uniform particle morphology;

• Established 1 μm platform;

• Reliable magnetic behavior;

• Strong automation compatibility;

• OEM customization;

• International commercial infrastructure;

• Long history of magnetic-separation technology.

Thermo Fisher continues to support commercial bead supply and OEM manufacturing across biotechnology, healthcare and diagnostic applications.

Best Suited For

Thermo Fisher is suitable for:

• Korean molecular diagnostic manufacturers;

• Automated extraction instruments;

• Viral testing workflows;

• Companies requiring a defined standard particle;

• High-throughput laboratories;

• Commercial OEM programs.

Considerations for Korean Buyers

The exact regulatory and commercial status varies by catalog product.

Buyers should confirm:

• Research-use versus OEM status;

• Commercial pack sizes;

• Further-manufacturing rights;

• Korean distributor availability;

• Quality agreements;

• Product-change notification;

• Bulk lead time.

4. Cytiva

Cytiva supplies SeraSil-Mag silica-coated superparamagnetic beads for nucleic acid isolation.

The SeraSil-Mag platform includes approximately 400 nm and 700 nm particles. Cytiva positions the beads for high-purity DNA extraction, including sensitive NGS and diagnostic applications where sample quantity is limited.

Main Products

The product family includes:

• SeraSil-Mag 400;

• SeraSil-Mag 700;

• Evaluation packages;

• 60 mL packages;

• 450 mL commercial packages;

• Customized diagnostic products.

Main Applications

SeraSil-Mag can be evaluated for:

• Genomic DNA extraction;

• Biofluid DNA extraction;

• Liquid biopsy workflows;

• Low-abundance DNA recovery;

• qPCR sample preparation;

• NGS sample preparation;

• Automated nucleic acid extraction;

• Diagnostic assay manufacturing.

Key Strengths

• Defined 400 nm and 700 nm particle formats;

• Silica-coated superparamagnetic structure;

• High magnetic responsiveness;

• Multiple commercial pack sizes;

• Diagnostic-development support;

• Low-background extraction;

• Commercial OEM capability.

Best Suited For

Cytiva is particularly suitable for:

• Sensitive diagnostic workflows;

• Liquid biopsy development;

• Low-copy DNA extraction;

• Automated sample preparation;

• NGS laboratories;

• Commercial-volume OEM projects.

Considerations for Korean Buyers

Buyers should confirm:

• Regional stock availability;

• Korean distributor arrangements;

• Minimum order quantity;

• Lot-reservation options;

• Quality documentation;

• Intended-use status;

• Custom-development requirements.

5. Merck MagPrep

Merck’s MagPrep platform includes silica magnetic particles developed for nucleic acid purification.

Merck states that MagPrep Silica particles were designed to meet the principal requirements of solid supports used in DNA and RNA purification. The particles can bind both DNA and RNA under chaotropic or mildly acidic conditions.

The standard MagPrep Silica particles have a reported diameter range of approximately 50–150 nm and are suspended in MES buffer.

Main Product Capabilities

Relevant products include:

• MagPrep Silica particles;

• Ultra-pure MagPrep particles;

• DNA-focused particle variants;

• DNA and RNA-binding formats;

• Viral RNA extraction components;

• Manual and automated purification materials.

Main Applications

MagPrep particles can be evaluated for:

• Genomic DNA extraction;

• RNA purification;

• Viral RNA extraction;

• Low-copy nucleic acid recovery;

• RT-qPCR preparation;

• Digital PCR preparation;

• Automated extraction;

• High-throughput IVD manufacturing.

Key Strengths

• Small particle diameter;

• High available surface area;

• DNA and RNA binding;

• Rapid magnetic response;

• Compatibility with common silica-binding buffers;

• Further-manufacturing experience;

• International quality infrastructure.

Best Suited For

Merck MagPrep is particularly relevant to:

• High-throughput molecular laboratories;

• Automated extraction developers;

• Viral RNA workflows;

• IVD manufacturers;

• Low-target-concentration applications.

Considerations for Korean Buyers

Buyers should determine:

• The most appropriate MagPrep variant;

• DNA versus RNA binding requirements;

• Nuclease and contaminating DNA specifications;

• Regional package availability;

• Korean distribution;

• Storage conditions;

• Change-notification terms.

6. QIAGEN

QIAGEN supplies MagAttract magnetic particles for silica-based DNA and RNA purification.

MagAttract Suspension G combines silica-based DNA binding with magnetic handling. DNA binds in the presence of chaotropic salt, contaminants are removed by washing and purified DNA is subsequently eluted.

Main Products

Relevant options include:

• MagAttract Suspension G;

• MagAttract HMW DNA Kit;

• Microbial DNA extraction products;

• Plant DNA extraction products;

• PCR cleanup protocols;

• Automated MagAttract workflows.

Automation Compatibility

QIAGEN identifies MagAttract Suspension G as compatible with:

• BioSprint 96;

• KingFisher Flex;

• Eppendorf epMotion;

• Tecan Fluent;

• Other programmable liquid-handling systems.

Main Applications

QIAGEN products support:

• Genomic DNA extraction;

• High-molecular-weight DNA;

• Microbial DNA;

• Plant DNA;

• PCR product purification;

• Sequencing sample preparation;

• Automated purification.

The MagAttract HMW DNA system uses high-performance magnetic particles and silica-based chemistry for high-yield, high-purity genomic DNA isolation.

Key Strengths

• Established silica purification chemistry;

• Standalone magnetic suspension;

• Broad automation compatibility;

• High-molecular-weight DNA capability;

• Detailed protocols;

• Strong international support;

• Korean-language product resources.

Best Suited For

QIAGEN is particularly suitable for:

• Laboratories requiring established protocols;

• High-molecular-weight DNA extraction;

• Sequencing laboratories;

• Automated genomic DNA purification;

• Companies already using QIAGEN platforms.

Considerations for Korean Buyers

QIAGEN provides an integrated purification ecosystem, which can shorten development time but may offer less customization than a dedicated raw-bead manufacturer.

Buyers should confirm:

• Standalone particle-use conditions;

• Further-manufacturing rights;

• Bulk pack availability;

• Korean technical support;

• Quality documentation;

• Long-term supply terms.

7. Promega

Promega supplies MagneSil Paramagnetic Particles and multiple associated nucleic acid purification systems.

MagneSil Paramagnetic Particles are available separately and are used in Promega’s Blood Genomic Max Yield System. Promega states that the standalone product is intended for laboratory or research use unless otherwise specified.

Main Products

Relevant platforms include:

• MagneSil Paramagnetic Particles;

• MagneSil fixed-yield particles;

• MagneSil Green;

• Wizard MagneSil genomic DNA systems;

• Plasmid purification systems;

• Sequencing reaction cleanup systems;

• Food DNA extraction products.

Main Applications

Promega technologies can be evaluated for:

• Genomic DNA extraction;

• Plasmid DNA purification;

• Food-testing workflows;

• PCR cleanup;

• Sequencing reaction cleanup;

• Automated 96-well processing;

• Robotic nucleic acid purification.

Key Strengths

• Established purification chemistry;

• Standalone particle availability;

• Multiple application-specific formats;

• Manual and automated protocols;

• High-throughput workflow experience;

• Certificates of Analysis;

• Broad molecular biology support.

Best Suited For

Promega is suitable for:

• Research and diagnostic development;

• Genomic DNA purification;

• Plasmid preparation;

• Sequencing facilities;

• Food-testing laboratories;

• High-throughput DNA processing.

Considerations for Korean Buyers

Some MagneSil products are designed as components of complete Promega workflows.

Buyers should confirm:

• Standalone product availability;

• Dependence on proprietary buffers;

• Compatibility with third-party equipment;

• OEM supply conditions;

• Commercial package size;

• Intended-use limitations.

8. Magtivio

Magtivio is a Netherlands-based magnetic sample-preparation specialist offering MagSi magnetic beads, extraction reagents, NGS cleanup products and automation hardware.

Its MagSi-DNA beads use a bind–wash–elute process and can be screened through a trial kit containing different bead formats.

Main Products and Capabilities

Magtivio offers:

• MagSi-DNA particles;

• MagSi-DNA trial kits;

• Pathogen DNA and RNA extraction;

• Tissue and cell extraction;

• Plant DNA extraction;

• Cell-free DNA products;

• NGS cleanup and size selection;

• Pre-filled reagent plates;

• Magnetic separation equipment;

• OEM components.

Main Applications

Magtivio products support:

• Genomic DNA;

• Viral DNA and RNA;

• Cell and tissue samples;

• Plant samples;

• Stool and microbiome workflows;

• Cell-free DNA;

• NGS library cleanup;

• Automated extraction;

• IVD kit development.

Magtivio also offers CE-marked pathogen extraction products and provides components as OEM building blocks for other IVD manufacturers.

Key Strengths

• Broad magnetic sample-preparation range;

• Multiple bead formats;

• Protocol screening;

• Pathogen and cfDNA products;

• NGS cleanup capability;

• Pre-filled consumables;

• Automation hardware;

• OEM support.

Best Suited For

Magtivio is particularly suitable for:

• Korean NGS laboratories;

• Pathogen extraction projects;

• Liquid biopsy development;

• Automated extraction systems;

• OEM diagnostic products;

• Companies requiring integrated reagents and hardware.

Considerations for Korean Buyers

Buyers should distinguish between:

• Standalone magnetic particles;

• Research kits;

• Diagnostic products;

• Pre-filled plates;

• OEM components.

Each format may require different qualification, import and regulatory strategies.

9. chemicell

chemicell is a German manufacturer of magnetic nano- and microparticles, including silica-based particles for DNA and RNA extraction.

Its SiMAG range includes porous and nonporous magnetic silica particles with different magnetic and surface characteristics.

Main Products

Relevant products include:

• SiMAG-K-DNA;

• SiMAG-MP-DNA;

• SiMAG-Silanol;

• Porous magnetic silica particles;

• Nonporous magnetic silica particles;

• Activated SiMAG particles;

• geneMAG extraction kits.

Main Applications

chemicell products can be evaluated for:

• Genomic DNA extraction;

• Plasmid DNA purification;

• Total RNA extraction;

• PCR cleanup;

• Automated nucleic acid separation;

• Biomolecule immobilization;

• Custom extraction development.

Key Strengths

• Specialized magnetic particle manufacturing;

• Porous and nonporous silica formats;

• Different magnetic properties;

• DNA/RNA separation products;

• Surface activation options;

• Custom-particle capability;

• European manufacturing.

Best Suited For

chemicell is suitable for:

• Custom extraction protocol development;

• Research laboratories;

• Automated DNA and RNA separation;

• Projects comparing different silica structures;

• Companies requiring additional surface modification.

Considerations for Korean Buyers

Customers should clearly define:

• Target nucleic acid;

• Sample matrix;

• Particle diameter;

• Porous or nonporous preference;

• Magnetic separator type;

• Annual volume;

• Required quality documents.

10. G-Biosciences

G-Biosciences supplies standalone silica magnetic beads for nucleic acid purification.

The particles consist of an Fe₃O₄ magnetic component coated with silicon dioxide and are offered in larger micrometre-scale formats.

Main Applications

The beads can be evaluated for:

• Plasmid DNA purification;

• Genomic DNA extraction;

• RNA purification;

• PCR product cleanup;

• Sequencing sample preparation;

• Laboratory method development.

Key Strengths

• Standalone silica-coated particles;

• Straightforward product format;

• Multiple package sizes;

• Larger micrometre-scale beads;

• Published purification protocols;

• DNA and RNA applications;

• PCR cleanup capability.

Best Suited For

G-Biosciences is suitable for:

• Laboratory protocol development;

• Plasmid DNA purification;

• PCR cleanup;

• Low- to medium-throughput workflows;

• Buyers comparing larger particles with submicrometre beads.

Considerations for Korean Buyers

Larger particles may behave differently in terms of:

• Surface area;

• Sedimentation;

• Dispensing;

• Mixing;

• Magnetic collection;

• Automation performance.

The product should be tested on the intended instrument before commercial selection.

Best Manufacturers by Extraction Application

The table is intended to provide an initial shortlist rather than replace laboratory evaluation.

How to Choose Silica Magnetic Beads

1. Match the Bead to the Target Nucleic Acid

Extraction requirements differ for:

• Genomic DNA;

• Viral RNA;

• Total RNA;

• Plasmid DNA;

• Cell-free DNA;

• High-molecular-weight DNA;

• PCR fragments.

Viral RNA extraction requires efficient recovery of low-copy targets and removal of RT-qPCR inhibitors.

High-molecular-weight DNA extraction requires gentle mixing to minimize mechanical shearing.

Cell-free DNA workflows may require efficient recovery of short fragments from relatively large plasma volumes.

2. Select the Appropriate Particle Diameter

Particle diameter affects:

• Total surface area;

• Binding capacity;

• Sedimentation;

• Magnetic collection;

• Dispensing consistency;

• Redispersibility;

• Bead carryover.

Smaller beads generally provide greater surface area per unit mass, but magnetic collection may take longer.

Larger beads may collect quickly but can sediment during automated dispensing.

No single particle size is ideal for every extraction system.

3. Evaluate Particle-Size Distribution

Request:

• Mean diameter;

• Standard deviation;

• Coefficient of variation;

• D10;

• D50;

• D90;

• Measurement method.

A broad size distribution can cause variation in:

• Magnetic response;

• Pipetting;

• Binding capacity;

• Sedimentation;

• Nucleic acid recovery.

4. Compare Silica Surface Chemistry

Products may be described as:

• Silica coated;

• Silane coated;

• Silica-like;

• Silanol functionalized;

• Hydroxyl modified.

These terms do not guarantee identical nucleic acid-binding performance.

Test each bead with the intended:

• Chaotropic salt;

• Alcohol concentration;

• Binding pH;

• Sample matrix;

• Wash solution;

• Elution buffer.

5. Measure Magnetic Collection Time

Magnetic response depends on:

• Magnet strength;

• Magnetic rod design;

• Tube or plate geometry;

• Liquid volume;

• Sample viscosity;

• Bead concentration;

• Particle diameter;

• Magnetic-core content.

A collection time measured in water may not represent performance in blood, sputum, tissue lysate or stool.

6. Evaluate Sedimentation and Dispensing

Rapid sedimentation can cause inconsistent bead concentration during automated aspiration.

Evaluate:

• Settling time;

• Need for reservoir mixing;

• Aspiration consistency;

• Dispensing coefficient of variation;

• Performance at the beginning and end of a run.

7. Evaluate Redispersibility

Beads must redisperse completely during washing and elution.

Poor redispersibility can cause:

• Reduced recovery;

• Incomplete washing;

• Increased contamination;

• Higher variability;

• Instrument failures.

8. Test Practical Binding Capacity

Do not rely only on a supplier’s theoretical capacity.

Test binding performance using:

• The actual nucleic acid;

• The expected fragment-size range;

• The real sample matrix;

• The final bead quantity;

• The intended binding buffer;

• The planned sample volume.

9. Check Bead Carryover

Residual particles in the eluate may:

• Affect absorbance readings;

• Create brown coloration;

• Interfere with PCR;

• Reduce sequencing quality;

• Contaminate downstream equipment.

Carryover can be evaluated through:

• Visual inspection;

• Reapplying the eluate to a magnet;

• Particle counting;

• Absorbance measurement;

• Downstream amplification testing.

10. Test Inhibitor Removal

High nucleic acid yield does not automatically mean high extraction quality.

The process must remove:

• Guanidinium salts;

• Ethanol;

• Detergents;

• Hemoglobin;

• Heparin;

• Polysaccharides;

• Polyphenols;

• Matrix-specific inhibitors.

Performance should be measured using the final qPCR, RT-qPCR, digital PCR or sequencing assay.

11. Compare Multiple Production Lots

Commercial qualification should include two or three representative production lots whenever possible.

Compare:

• Particle diameter;

• Solids concentration;

• Magnetic response;

• Binding capacity;

• Recovery;

• Purity;

• Bead carryover;

• Downstream amplification;

• Stability.

How to Evaluate Beads for Automated Extraction

Automation performance depends on both chemical and mechanical compatibility.

Magnetic Rod Instruments

Magnetic rod systems move beads between wells or reagent plates.

Important characteristics include:

• Rapid capture;

• Complete bead release;

• Low particle loss;

• Efficient redispersion;

• Performance in viscous lysates;

• Minimal cross-contamination.

Liquid-Handling Workstations

Pipette-based systems require:

• Stable suspension;

• Consistent aspiration;

• Accurate low-volume dispensing;

• Minimal reservoir settling;

• Low adhesion to pipette tips;

• Low adhesion to plastic surfaces.

Plate-Based Systems

Evaluate:

• Plate geometry;

• Magnet-to-well distance;

• Dead volume;

• Collection position;

• Mixing speed;

• Edge-well performance;

• Splashing;

• Aerosol formation.

Recommended Automation Tests

A qualification run should measure:

• Nucleic acid recovery in every well;

• Coefficient of variation;

• Failed-well frequency;

• Bead loss;

• Bead carryover;

• Cross-contamination;

• Run-to-run reproducibility;

• Total cycle time.

A bead should not be selected for automation only because it performs well in a manually processed tube.

Korea-Specific Procurement Considerations

Korean Manufacturer vs International Supplier

Bioneer offers Korean domestic manufacturing and local access.

SANYU, Thermo Fisher, Cytiva and other international suppliers may provide broader customization or different particle technologies.

Local Distributor vs Direct Manufacturer

A Korean distributor may provide:

• Local quotations;

• Faster delivery;

• Korean-language communication;

• Import support;

• Small evaluation quantities;

• Local inventory.

Direct manufacturer contact is often preferable for:

• Custom particle development;

• Bulk production;

• OEM agreements;

• Quality agreements;

• Technical investigations;

• Change-control discussions.

Transportation and Storage

Korean buyers should confirm:

• Shipping temperature;

• Freeze sensitivity;

• Maximum transport duration;

• Temperature-excursion limits;

• Need for a temperature logger;

• Storage conditions;

• Shelf life.

Products stored at 2–8°C may require controlled shipping. Freezing can cause irreversible aggregation in some magnetic bead suspensions.

Secondary Supplier Strategy

Qualifying a second source may reduce risk from:

• Production interruptions;

• Import delays;

• Raw-material shortages;

• Discontinued products;

• Changes in distributor arrangements.

However, particles from different manufacturers are not automatically interchangeable.

A supplier change may require:

• Buffer optimization;

• Bridging studies;

• Stability testing;

• Partial revalidation;

• Regulatory change assessment.

MFDS and Korean IVD Regulatory Considerations

The Korean Ministry of Food and Drug Safety regulates medical devices and in-vitro diagnostic medical devices.

MFDS maintains separate rules and guidance covering:

• IVD approval;

• Product certification and notification;

• Import approval;

• Manufacturing and importing businesses;

• Technical-document review;

• Medical-device GMP;

• Quality management.

Companies intending to manufacture a medical device in Korea or import a medical device from another country generally need the appropriate manufacturing or importing business authorization. Product approval, certification or notification requirements depend on the device category and risk classification.

Raw Bead vs Finished IVD

A standalone silica magnetic bead supplied as an industrial raw material is not automatically regulated in the same manner as a finished nucleic acid extraction kit.

Its status depends on:

• Intended purpose;

• Product claims;

• Labeling;

• Packaging;

• Whether buffers and protocols are included;

• Whether it is presented as a diagnostic reagent;

• Its role within the final IVD system.

A finished diagnostic extraction kit may be subject to MFDS approval, certification or notification depending on its intended use and classification.

The finished IVD manufacturer should control the magnetic bead as a critical raw material through:

• Approved specifications;

• Supplier qualification;

• Incoming inspection;

• Lot traceability;

• Change notification;

• Risk management;

• Analytical performance studies;

• Stability testing;

• Complaint investigation.

Imported Medical Devices

For finished imported medical devices or IVDs, Korean import requirements may involve:

• A licensed Korean importer;

• Product approval, certification or notification;

• Technical documentation;

• Quality-management evidence;

• Korean labeling;

• Post-market obligations.

The exact requirements should be confirmed with MFDS or a qualified Korean regulatory specialist.

This article does not constitute legal or regulatory advice.

Documents Required for Supplier Qualification

Korean IVD manufacturers should request appropriate documents before approving a bead supplier.

The package may include:

• Product specification;

• Certificate of Analysis;

• Safety Data Sheet;

• Technical Data Sheet;

• Particle-size report;

• Particle-size distribution;

• Silica coating description;

• Solids concentration;

• Magnetic-response specification;

• Binding-capacity information;

• Suspension-buffer composition;

• Preservative information;

• Microbial limits;

• Nuclease statement;

• Contaminating DNA statement;

• Stability data;

• Storage conditions;

• Shipping requirements;

• Quality-management certificate;

• Manufacturing-site information;

• Country-of-origin statement;

• Batch-traceability procedure;

• Change-control policy;

• Complaint-handling procedure;

• Business-continuity plan;

• Regulatory-support statement;

• Quality-agreement template.

For imported materials, buyers may also need:

• Commercial invoice;

• Packing list;

• Certificate of origin;

• Import classification information;

• Korean-language safety documents where applicable.

Recommended Supplier Evaluation Process

Step 1: Define the Target Bead Specification

Specify:

• Target particle diameter;

• Acceptable size distribution;

• Silica surface type;

• Solids concentration;

• Required magnetic collection time;

• Storage buffer;

• Annual volume;

• Packaging requirements.

Step 2: Shortlist Three to Five Suppliers

The shortlist should ideally include:

• One Korean domestic manufacturer;

• One customizable raw-bead manufacturer;

• One established multinational supplier;

• One potential secondary source.

Step 3: Request Representative Samples

Confirm that samples:

• Come from the normal manufacturing process;

• Use the planned commercial formulation;

• Are representative of future production lots.

Step 4: Screen Buffer Chemistry

Evaluate combinations of:

• Chaotropic salt;

• Alcohol concentration;

• Binding pH;

• Bead-to-sample ratio;

• Binding time;

• Mixing intensity;

• Wash formulation;

• Elution temperature.

Step 5: Test Real Sample Matrices

Relevant matrices may include:

• Whole blood;

• Plasma;

• Serum;

• Respiratory swabs;

• Saliva;

• Urine;

• Tissue;

• Stool;

• Microbial cultures;

• Plant samples.

Step 6: Test the Intended Instrument

Use the final:

• Magnetic rack;

• Magnetic rod extractor;

• Liquid-handling workstation;

• Plate type;

• Tip type;

• Mixing speed;

• Software program.

Step 7: Evaluate Downstream Performance

Measure:

• DNA or RNA recovery;

• Purity;

• qPCR cycle threshold;

• RT-qPCR efficiency;

• Inhibition;

• Sequencing quality;

• Reproducibility.

Step 8: Test Multiple Lots

Evaluate two or three representative lots whenever possible.

Step 9: Conduct Stability Studies

Include:

• Real-time stability;

• Accelerated stability;

• Freeze-thaw exposure;

• Transportation simulation;

• Open-bottle stability;

• Pre-filled plate stability.

Step 10: Complete the Commercial Review

Confirm:

• Commercial price;

• Minimum order quantity;

• Standard production batch;

• Annual capacity;

• Manufacturing lead time;

• Delivery time;

• Lot reservation;

• Safety stock;

• Quality agreement;

• Change notification;

• Complaint-response time;

• Backup supply arrangements.

Frequently Asked Questions

Who Are the Leading Silica Magnetic Bead Manufacturers Serving Korea?

Leading suppliers include Bioneer, SANYU, Thermo Fisher Scientific, Cytiva, Merck, QIAGEN, Promega, Magtivio, chemicell and G-Biosciences.

Bioneer is a notable Korean domestic manufacturer, while the remaining companies serve Korea through international sales, regional offices or distributors.

Is Bioneer a Korean Silica Magnetic Bead Manufacturer?

Yes.

Bioneer is based in the Republic of Korea and supplies AccuBead and AccuNanoBead silica-coated magnetic particles in micrometre and nanometre sizes.

Which Manufacturer Is Best for Custom Silica Magnetic Beads?

SANYU is a strong candidate for custom particle size, solids concentration, surface modification, packaging and OEM manufacturing.

Cytiva, Thermo Fisher, Magtivio and chemicell may also support customized or OEM projects.

Which Manufacturer Offers 200 nm Silica Magnetic Beads?

Bioneer offers approximately 200 nm AccuNanoBead particles.

SANYU offers AMS200-10 with a nominal diameter of 200 nm and a 5% solids concentration.

Which Manufacturer Offers a 1 μm Silane Bead?

Thermo Fisher Scientific offers Dynabeads MyOne Silane, a uniform approximately 1 μm silica-like magnetic particle.

Which Beads Are Suitable for Viral RNA Extraction?

Relevant candidates include:

• Bioneer silica magnetic beads;

• SANYU silica magnetic beads;

• Thermo Fisher Dynabeads MyOne Silane;

• Cytiva SeraSil-Mag;

• Merck MagPrep;

• Magtivio pathogen extraction products.

The final choice should be based on recovery from the actual sample matrix and downstream RT-qPCR performance.

Which Beads Are Best for Automated Extraction?

Automation-oriented options include:

• Bioneer AccuBead or AccuNanoBead;

• SANYU silica magnetic beads;

• Thermo Fisher Dynabeads MyOne Silane;

• Cytiva SeraSil-Mag;

• Merck MagPrep;

• QIAGEN MagAttract;

• Magtivio MagSi-DNA.

Every candidate must be validated on the intended extraction instrument.

Can the Same Silica Bead Extract Both DNA and RNA?

Many silica magnetic beads can bind both DNA and RNA under suitable conditions.

Recovery and selectivity depend on:

• Chaotropic salt;

• Alcohol concentration;

• Buffer pH;

• Sample matrix;

• Washing conditions;

• Elution conditions.

Are Silica Magnetic Beads Better Than Spin Columns?

Magnetic beads are generally easier to automate because the solid phase can be collected without repeated centrifugation.

Spin columns remain convenient for small numbers of manually processed samples.

The best method depends on:

• Throughput;

• Automation;

• Sample volume;

• Extraction performance;

• Labor cost;

• Scalability.

What Causes Low DNA or RNA Recovery?

Common causes include:

• Incomplete lysis;

• Incorrect binding-buffer chemistry;

• Insufficient bead quantity;

• Poor mixing;

• Bead aggregation;

• Short binding time;

• Excessive drying;

• Incomplete elution;

• Incorrect elution pH;

• Bead loss during washing.

What Causes Bead Carryover?

Bead carryover may result from:

• Weak magnets;

• Very small particles;

• Short collection time;

• High sample viscosity;

• Disturbing the collected bead layer;

• Incorrect pipette position;

• Excessive aspiration speed.

The eluate may be placed on a magnet again before transfer to the downstream assay.

Are All Silica Magnetic Beads Suitable for Commercial IVD Manufacturing?

No.

Some products are intended only for research use.

Commercial manufacturers should evaluate:

• Intended-use status;

• Quality documentation;

• Lot consistency;

• Manufacturing continuity;

• Further-manufacturing rights;

• Change notification;

• Regulatory support.

Does a Raw Silica Magnetic Bead Require MFDS Approval?

A raw bead sold only as an industrial component may not be regulated in the same way as a finished diagnostic product.

The regulatory status depends on intended purpose, labeling, claims, packaging and how the product is placed on the Korean market.

The finished IVD manufacturer remains responsible for controlling the bead within its quality and technical documentation.

Should Korean Buyers Choose a Domestic Manufacturer?

A Korean manufacturer may provide:

• Shorter lead times;

• Easier communication;

• Simplified logistics;

• Local technical support;

• Easier supplier audits.

International suppliers may provide:

• Broader product ranges;

• Alternative bead sizes;

• Greater OEM flexibility;

• Additional supply-chain security.

The final decision should be based on performance, documentation, supply continuity and total cost.

How Many Bead Suppliers Should Be Qualified?

Qualifying at least two technically acceptable suppliers can reduce supply-chain risk.

However, particles from different manufacturers should not be assumed to be interchangeable.

A supplier change may require:

• Buffer reoptimization;

• Bridging studies;

• Stability studies;

• Partial revalidation;

• Regulatory assessment.

Final Recommendations

Korea has a strong biotechnology, molecular diagnostic and automated laboratory sector, together with domestic magnetic bead manufacturing capability.

Bioneer ranks first because it is a Korean manufacturer offering silica-coated magnetic beads in nanometre and micrometre formats, with local technical access and reduced import complexity.

SANYU ranks second and is the only Chinese manufacturer included. Its advantages include a broad nominal particle-size range, flexible concentration, bulk packaging, OEM services and direct raw-material supply for proprietary extraction kits and automated platforms.

Thermo Fisher Scientific provides a well-established uniform magnetic bead platform together with commercial OEM support.

Cytiva offers SeraSil-Mag 400 and 700 particles for sensitive DNA extraction, liquid biopsy, NGS and diagnostic workflows.

Merck MagPrep provides small silica magnetic particles with efficient DNA and RNA binding and rapid magnetic response.

QIAGEN combines MagAttract silica chemistry with broad instrument compatibility and high-molecular-weight DNA applications.

Promega supports genomic DNA, plasmid, sequencing, food-testing and automated purification workflows through the MagneSil platform.

Magtivio offers magnetic bead screening, pathogen extraction, cfDNA, NGS and OEM products.

chemicell provides porous and nonporous magnetic silica particles for customized DNA and RNA separation.

G-Biosciences supplies accessible larger silica-coated particles for plasmid DNA, genomic DNA, RNA and PCR cleanup.

Korean buyers should compare:

• Particle-size distribution;

• Silica surface properties;

• Magnetic response;

• Sedimentation;

• Redispersibility;

• DNA and RNA recovery;

• Inhibitor removal;

• Bead carryover;

• Automation performance;

• Lot consistency;

• Quality documentation;

• Korean inventory;

• Commercial capacity;

• OEM support;

• Change-control procedures.

Testing several bead candidates with the actual sample matrix, binding buffer, extraction instrument and downstream molecular assay remains the most reliable way to select silica magnetic beads for long-term diagnostic manufacturing in Korea.