Top 10 Silica Magnetic Bead Manufacturers in Taiwan 2026

Quick Answer: Top 10 Silica Magnetic Bead Manufacturers in Taiwan

The top 10 silica magnetic bead manufacturers and specialist suppliers serving Taiwan in 2026 are:

1. Taiwan Advanced Nanotech Inc. — TANBead

2. SANYU GROUP

3. GeneReach Biotechnology

4. Cytiva

5. Thermo Fisher Scientific

6. QIAGEN

7. Promega

8. New England Biolabs

9. Magtivio

10. AMD Biotech

These companies provide standalone silica magnetic beads, silica-like magnetic particles, nucleic acid extraction reagents, automated purification systems or OEM solutions for DNA and RNA extraction.

This is an editorial comparison based on publicly available information reviewed in 2026. The ranking considers silica magnetic bead specialization, availability of raw beads, application coverage, automation compatibility, customization, quality documentation, local support and potential commercial supply to Taiwanese customers.

“Manufacturers in Taiwan” in this article refers to manufacturers and qualified suppliers serving Taiwan’s biotechnology, molecular diagnostics and life science market. Not every company operates a manufacturing facility in Taiwan.

TANBead and GeneReach are Taiwan-based companies. SANYU ranks second and is the only China-based manufacturer included in this guide.

Comparison of the Top 10 Silica Magnetic Bead Manufacturers

Why Silica Magnetic Beads Matter to Taiwan’s Molecular Diagnostics Industry

Taiwan has an established biotechnology, molecular diagnostics, medical-device, precision medicine and semiconductor-enabled automation ecosystem. Silica magnetic beads support many of the sample-preparation steps required before PCR, RT-qPCR, digital PCR, genotyping and sequencing.

A typical silica magnetic bead contains a magnetically responsive core surrounded by a silica or silica-like nucleic acid-binding surface.

Under suitable binding conditions, DNA or RNA adsorbs onto the bead surface. A magnet then collects the particles while proteins, salts, lipids, cellular debris and other contaminants are removed.

Silica magnetic beads are used in Taiwan for applications including:

• Viral DNA and RNA extraction;

• Whole-blood genomic DNA purification;

• Pathogen nucleic acid extraction;

• Cell-free DNA and liquid biopsy;

• FFPE DNA and RNA purification;

• HPV and STI testing;

• Food and agricultural testing;

• Environmental microbiome analysis;

• Forensic DNA extraction;

• NGS sample preparation;

• Automated clinical laboratory workflows.

TFDA defines an IVD as a medical device—including reagents, instruments or systems—used to collect, prepare or test human specimens for diagnosing disease or determining health status. The regulatory treatment of a standalone raw bead depends on its intended use and how it is placed on the market; it should not automatically be assumed to have the same status as a finished extraction kit.

Standalone Beads vs Extraction Kits and Automated Platforms

Not every company in this ranking sells exactly the same type of product.

Standalone Silica Magnetic Beads

Standalone raw beads allow an extraction-kit developer to formulate its own:

• Lysis buffer;

• Chaotropic binding solution;

• Alcohol concentration;

• Wash buffers;

• Elution buffer;

• Bead concentration;

• Sample-to-bead ratio;

• Automated mixing program.

SANYU, Cytiva, Thermo Fisher, QIAGEN, Promega, NEB, Magtivio and AMD Biotech offer products that can be purchased or evaluated separately from a complete extraction instrument.

Integrated Extraction Platforms

TANBead and GeneReach primarily differentiate themselves through integrated combinations of magnetic particles, prefilled extraction reagents and automated instruments.

An integrated platform can reduce development time and simplify method transfer. However, it may offer less freedom to change the bead, buffer or instrument independently.

Which Supplier Type Is Better?

A standalone bead manufacturer may be preferable for:

• Extraction-kit OEMs;

• Reagent formulators;

• Open-platform instrument companies;

• Customized sample types;

• Cost optimization;

• Private-label production.

An integrated platform supplier may be preferable for:

• Clinical laboratories;

• Hospitals;

• Laboratories requiring a validated workflow;

• Customers that need local installation and service;

• Projects with limited reagent-development resources.

How We Ranked the Manufacturers

Silica or Silica-Like Surface Technology

Priority was given to suppliers with a publicly documented silica-coated, silicon-dioxide-coated, silane or silica-like magnetic particle.

Companies selling only carboxyl, streptavidin or antibody-coated magnetic beads were not included unless they also offered a silica-based nucleic acid purification platform.

Relevance to DNA and RNA Extraction

The assessment considered applications involving:

• Genomic DNA;

• Viral DNA;

• Viral RNA;

• Total nucleic acid;

• Cell-free DNA;

• FFPE DNA and RNA;

• Plasmid DNA;

• Plant DNA;

• Microbial DNA;

• PCR cleanup;

• Sequencing sample preparation.

Raw-Bead Availability

Suppliers of standalone particles received additional consideration because raw beads provide greater flexibility for kit manufacturers and automated-extraction developers.

The ranking also includes Taiwanese integrated-platform manufacturers because they are highly relevant to local purchasing intent.

Automation Compatibility

Important formats include:

• Manual magnetic racks;

• 24-well systems;

• 48-well systems;

• 96-well plates;

• Magnetic rod extractors;

• Liquid-handling workstations;

• Microfluidic systems;

• Fully automated sample-to-answer platforms.

Customization and OEM Support

Commercial projects may require customized:

• Particle diameter;

• Silica-shell structure;

• Magnetic content;

• Solids concentration;

• Suspension buffer;

• Package size;

• Prefilled plates;

• Private labels;

• Instrument protocols.

Quality and Commercial Documentation

The evaluation also considered the availability of:

• Certificates of analysis;

• Product specifications;

• Quality-system information;

• Storage conditions;

• Technical protocols;

• Batch traceability;

• OEM or ODM services;

• Commercial package sizes.

1. Taiwan Advanced Nanotech Inc. — TANBead

Taiwan Advanced Nanotech Inc., commonly known as TANBead, is a Taiwan-based manufacturer specializing in magnetic particles, nucleic acid extraction reagents and automated extraction instruments.

The company was established in 2004 and describes nucleic acid purification as its core field. Its current portfolio includes automated extraction instruments, extraction reagent kits, functional magnetic beads, filling-line systems and OEM or ODM services.

Main Technologies

TANBead provides:

• Nano-magnetic bead extraction chemistry;

• Silicon-dioxide-coated magnetic particles;

• Prefilled extraction plates and tubes;

• Maelstrom automated extraction instruments;

• Functional magnetic beads;

• Reagent filling systems;

• OEM and ODM services.

TANBead’s technical documentation describes magnetic beads with a silicon dioxide layer that adsorbs nucleic acids during extraction.

Main Extraction Applications

The company offers reagent families for:

• Viral nucleic acids;

• Cell-free DNA;

• HPV DNA;

• Universal pathogens;

• Whole blood and buffy coat;

• FFPE tissue;

• Bacteria and fungi;

• Forensic specimens;

• Stool samples;

• Environmental microbiomes;

• Food and plant material;

• Animal samples.

Its product portal lists dedicated extraction families for virus, cfDNA, forensic, blood, FFPE, stool, environmental, food and plant applications.

Viral and Pathogen Extraction

TANBead’s 665-series products use automated nano-magnetic bead extraction for viral nucleic acids and are designed to produce purified material suitable for PCR, RT-PCR and real-time PCR workflows. Its 66P-MS series covers bacteria, fungi, viruses, parasites and mycoplasma across multiple clinical sample types.

cfDNA and FFPE

The company provides dedicated cell-free DNA and FFPE extraction product families.

These applications are technically demanding because cfDNA is present at low concentration and FFPE samples often contain fragmented, cross-linked nucleic acids.

Why TANBead Ranks First

TANBead ranks first because it combines:

• Taiwan-based magnetic bead development;

• Extraction reagent manufacturing;

• Automated extraction instruments;

• Broad sample-type coverage;

• Local technical support;

• Filling-line and OEM capabilities.

It is particularly suitable for laboratories or diagnostic companies seeking a complete Taiwan-based extraction solution rather than only a raw magnetic bead.

What Buyers Should Confirm

Before selecting TANBead, confirm:

• Whether the product is IVD or RUO;

• Compatible extraction instrument;

• Sample volume;

• Elution volume;

• Extraction throughput;

• Target nucleic acid;

• Available application data;

• Required pretreatment;

• Local service coverage;

• Reagent supply agreement;

• Lot-to-lot acceptance criteria.

2. SANYU GROUP

SANYU GROUP manufactures silica magnetic beads and other functional microspheres for DNA and RNA extraction, molecular diagnostics, IVD development, bioseparation and life science research.

SANYU ranks second and is the only China-based manufacturer included in this article.

Main Silica Magnetic Bead Products

SANYU’s AMS series includes silica-coated magnetic particles in nano- and micron-scale formats.

One publicly listed product, AMS200-10, has:

• A nominal diameter of 200 nm;

• A silica surface layer;

• A 5% solids aqueous suspension;

• Standard packages from 10 mL to 1,000 mL;

• Recommended storage at 2–8°C.

The product is positioned for DNA extraction, RNA extraction, molecular diagnostics and biomolecule purification.

The company also offers larger magnetic silica microspheres, including a nominal 2 µm product for magnetic separation and automated sample preparation.

Main Applications

SANYU silica magnetic beads can be evaluated for:

• Viral DNA extraction;

• Viral RNA extraction;

• Genomic DNA purification;

• Total nucleic acid extraction;

• Bacterial DNA extraction;

• Plant DNA extraction;

• Molecular diagnostic kit development;

• Automated magnetic rod systems;

• Laboratory-developed extraction protocols;

• OEM reagent manufacturing.

Customization Capability

Potential customized specifications include:

• Particle diameter;

• Particle-size distribution;

• Magnetic response;

• Silica-shell properties;

• Solids concentration;

• Suspension buffer;

• Package volume;

• OEM labeling;

• Commercial batch size.

SANYU states that it supports OEM and ODM projects and manufactures microspheres and magnetic beads for IVD, POCT and bioseparation applications.

Why SANYU Ranks Second

SANYU ranks second because it sells standalone silica magnetic beads rather than requiring customers to purchase a closed extraction system.

This makes the products particularly relevant to Taiwanese:

• Extraction-kit manufacturers;

• Automation companies;

• Molecular diagnostic developers;

• Reagent formulators;

• OEM and private-label businesses.

The availability of different particle formats and bulk packages can support development from small-scale evaluation through commercial manufacturing.

What Taiwanese Buyers Should Confirm

Request and evaluate:

• Lot-specific certificate of analysis;

• Particle-size test method;

• Silica-shell characterization;

• Solids concentration;

• Magnetic separation time;

• Suspension stability;

• DNase and RNase testing;

• Microbial limits;

• Binding-capacity data;

• Available bulk volume;

• Shipping temperature;

• Country-of-origin documents;

• Change-notification procedures.

Buyers should test the beads using the actual extraction buffers and automation program. A strong bead specification does not guarantee optimal performance with an unsuitable lysis or binding formulation.

3. GeneReach Biotechnology

GeneReach Biotechnology is a Taiwan-based molecular diagnostic company headquartered in Taichung.

Its taco nucleic acid extraction products combine silica-coated magnetic beads, extraction reagents and automated taco or taco mini instruments.

Extraction Principle

GeneReach states that homogenized samples are lysed and nucleic acids bind to silica-coated magnetic beads. Washing buffers remove impurities, after which an elution buffer releases the purified DNA or RNA.

Main Products

The taco reagent portfolio includes:

• Total DNA Extraction Kit;

• DNA/RNA Extraction Kit;

• Plant DNA/RNA Extraction Kit;

• Prefilled DNA/RNA Extraction Set;

• Sample storage and stabilization solution.

The company lists applications for whole blood, buffy coat, animal tissue, cells, plant material and viral DNA or RNA.

Automated Extraction Systems

GeneReach offers taco and taco mini automated extraction instruments.

Its broader POCKIT Central platform integrates magnetic bead nucleic acid extraction, robotic liquid handling and insulated isothermal PCR into a sample-to-answer workflow.

Main Advantages

GeneReach may be especially suitable for Taiwanese customers requiring:

• Local communication;

• Integrated extraction instruments;

• Prefilled reagent formats;

• Animal-health or aquaculture testing;

• Viral nucleic acid extraction;

• A combined extraction and amplification platform.

Why GeneReach Ranks Third

GeneReach ranks third because it offers clearly documented silica-coated magnetic bead extraction technology together with Taiwan-based instrumentation and reagents.

It is more of an integrated platform supplier than an unrestricted raw-bead manufacturer. For customers developing completely open extraction chemistry, SANYU or Cytiva may provide greater raw-material flexibility.

What Buyers Should Confirm

Confirm:

• IVD or research-use status;

• Sample compatibility;

• Extraction throughput;

• Instrument requirements;

• Reagent package size;

• DNA and RNA recovery;

• Downstream PCR compatibility;

• Consumable supply;

• Instrument maintenance;

• OEM possibilities;

• Access to standalone beads, if required.

4. Cytiva

Cytiva manufactures SeraSil-Mag silica-coated superparamagnetic beads for nucleic acid purification.

The particles are designed to combine a silica binding surface with rapid magnetic separation.

Main Product Platform

SeraSil-Mag products include submicron silica magnetic beads for nucleic acid isolation.

Cytiva identifies SeraSil-Mag as a high-purity extraction solution for sensitive applications in which the available sample is limited. It also offers customized magnetic bead and diagnostic-reagent development support.

A commercially listed SeraSil-Mag 400 product is supplied as silica-coated superparamagnetic beads, with magnetic nanoparticles in the core providing rapid collection in an external magnetic field.

Best Applications

Cytiva is particularly suitable for:

• Cell-free DNA;

• Liquid biopsy;

• Low-input genomic DNA;

• Molecular diagnostic development;

• Automated DNA purification;

• PCR sample preparation;

• NGS workflows;

• OEM extraction reagents.

Main Advantages

Potential advantages include:

• True silica-coated surface;

• Submicron particle formats;

• Large available surface area;

• Fast magnetic response;

• Standalone bead availability;

• Commercial diagnostic support;

• Custom-development capability.

Why Cytiva Ranks Fourth

Cytiva ranks fourth because SeraSil-Mag is a specialized standalone raw-bead platform with strong relevance to sensitive molecular diagnostic applications.

It may be especially attractive to Taiwanese developers that want an established international reference material for benchmarking a new extraction formulation.

What Buyers Should Confirm

Confirm:

• Exact bead diameter;

• Product concentration;

• Available package sizes;

• Taiwan distributor or direct supply;

• Binding-buffer recommendations;

• Commercial use conditions;

• OEM availability;

• Change-control policy;

• Lot reservation;

• Local inventory.

5. Thermo Fisher Scientific

Thermo Fisher Scientific offers Dynabeads MyOne SILANE for magnetic nucleic acid capture.

These beads use optimized silica-like surface chemistry rather than a conventional exposed silica-shell description.

Main Product Characteristics

Dynabeads MyOne SILANE are uniform, nominally 1 µm magnetic particles with an optimized silica-like surface and high specific surface area.

Thermo Fisher describes the particles as highly cross-linked polystyrene beads containing distributed magnetic material, with a coated exterior that encloses the iron oxide and provides silica-like nucleic acid-binding chemistry.

Main Applications

The platform can be used for:

• Total DNA and RNA isolation;

• Viral DNA extraction;

• Viral RNA extraction;

• Serum and plasma;

• Whole blood;

• Genomic DNA;

• Automated extraction;

• OEM nucleic acid purification.

Thermo Fisher also supplies dedicated SILANE kits with buffer systems optimized for genomic DNA or small quantities of viral nucleic acids.

Main Advantages

Dynabeads MyOne SILANE offers:

• Uniform particle diameter;

• High surface area;

• Low sedimentation relative to larger particles;

• Efficient mixing;

• Strong magnetic handling;

• Extensive technical protocols;

• Global commercial supply;

• OEM support.

Why Thermo Fisher Ranks Fifth

Thermo Fisher is particularly strong when reproducibility, automated handling and diagnostic-development support are more important than purchasing the lowest-cost raw particle.

It ranks below local Taiwanese companies and SANYU because Taiwanese buyers seeking open-formulation bulk beads may find the commercial and customization structure less flexible.

What Buyers Should Confirm

Determine whether the project requires:

• Standard catalog beads;

• A complete SILANE extraction kit;

• An OEM-grade product;

• Custom packaging;

• A quality agreement;

• Commercial manufacturing authorization;

• Long-term lot reservation.

6. QIAGEN

QIAGEN provides MagAttract Suspension G and extraction systems based on silica magnetic particle technology.

MagAttract technology combines silica-based nucleic acid binding with magnetic handling.

Main Product Platform

MagAttract Suspension G is available as a separate magnetic particle suspension.

QIAGEN states that its magnetic-particle technology combines silica-based DNA purification with convenient magnetic separation.

Main Applications

QIAGEN’s MagAttract workflows cover applications such as:

• Genomic DNA;

• High-molecular-weight DNA;

• Tissue DNA;

• Blood DNA;

• Plant DNA;

• Microbiome workflows;

• Automated high-throughput extraction.

The MagAttract HMW DNA Kit includes Suspension G and a complete set of lysis, binding, washing and elution reagents.

Automation Compatibility

MagAttract particles can be used in manual magnetic-rack workflows and adapted to supported automated platforms.

The value of QIAGEN is not only the bead itself but also the availability of established buffers, kits and application protocols.

Why QIAGEN Ranks Sixth

QIAGEN is a strong option for laboratories seeking a documented extraction system, especially for high-molecular-weight DNA.

It may be less suitable for a reagent manufacturer that wants unrestricted control over every buffer component or custom bead specification.

What Buyers Should Confirm

Confirm:

• Intended sample type;

• Required DNA fragment length;

• Manual or automated format;

• Instrument compatibility;

• Standalone bead availability;

• Taiwan stock status;

• RUO or IVD designation;

• Commercial manufacturing rights.

7. Promega

Promega manufactures MagneSil Paramagnetic Particles for magnetic nucleic acid purification.

The MagneSil platform is used in standalone products and complete DNA purification systems.

Main Product Platform

Promega offers MagneSil particles separately in a 25 mL format and uses related particles in blood genomic DNA, plasmid and sequencing cleanup products.

Promega describes MagneSil systems as silica-coated paramagnetic particle technologies that can be scaled for automated and multiwell DNA purification.

Main Applications

MagneSil particles are relevant to:

• Genomic DNA extraction;

• Whole-blood DNA;

• Plasmid purification;

• Food DNA testing;

• PCR cleanup;

• Sequencing reaction cleanup;

• 96-well processing;

• Automated liquid-handling systems.

Main Advantages

Promega provides:

• Standalone particles;

• Established DNA purification protocols;

• Multiwell automation;

• Reagent systems for different DNA types;

• Technical support for downstream molecular biology.

Why Promega Ranks Seventh

Promega is a practical option for laboratories and manufacturers seeking proven DNA purification chemistry.

Its portfolio is more focused on established workflows than on custom silica magnetic bead engineering.

What Buyers Should Confirm

Request information on:

• Particle concentration;

• Binding capacity;

• Suitable buffer system;

• Recommended sample volume;

• Taiwan distribution;

• Bulk packaging;

• OEM use;

• Lot documentation;

• Shelf life.

8. New England Biolabs

New England Biolabs offers Monarch Mag Beads M1 and M2 for magnetic nucleic acid purification.

Both bead types are silica-coated, but they are designed for different extraction requirements.

Monarch Mag Beads M1

M1 particles are used in the Monarch Mag Viral DNA/RNA Extraction Kit.

NEB positions them for sensitive capture from samples containing relatively few target nucleic acid molecules.

Monarch Mag Beads M2

M2 particles contain a silica coating that supports nucleic acid adsorption under high-salt conditions.

They can be purchased separately for protocol development and higher-input purification workflows.

General Bead Architecture

NEB describes M1 and M2 as silica-coated particles with silanol groups on the shell, submicron particle sizes and superparamagnetic cores.

Best Applications

NEB is particularly suitable for:

• Viral DNA and RNA;

• Low-copy nucleic acid capture;

• General DNA purification;

• Extraction protocol development;

• Molecular biology laboratories;

• Customized bind-wash-elute experiments.

NEB also introduced additional magnetic nucleic acid purification products in 2026, including a cell-free DNA extraction workflow.

Why NEB Ranks Eighth

NEB provides well-documented bead chemistry and a useful distinction between low-input and general-purpose bead formats.

It ranks below several larger suppliers because its commercial OEM and customized particle portfolio is less extensive.

What Buyers Should Confirm

Confirm:

• M1 or M2 suitability;

• Package size;

• Binding-buffer requirements;

• Automation compatibility;

• Taiwan availability;

• RUO limitations;

• Commercial manufacturing conditions.

9. Magtivio

Magtivio manufactures the MagSi-DNA family of magnetic beads for DNA extraction and purification protocol development.

Its portfolio is valuable when developers need to compare multiple bead diameters rather than selecting one fixed product.

Main Product Range

Magtivio offers MagSi-DNA products in several nominal sizes:

• 300 nm;

• 600 nm;

• 1.2 µm;

• 3.0 µm.

A trial kit includes all four size classes, allowing developers to screen magnetic response, binding performance, sedimentation and automation behavior.

Main Applications

MagSi-DNA products are intended for:

• DNA extraction;

• DNA purification;

• Protocol development;

• Multiple sample sources;

• Different buffer systems;

• Microfluidic systems;

• Automated extraction;

• OEM development.

Why Particle Range Matters

Smaller beads generally provide greater surface area per unit mass and slower sedimentation.

Larger beads may collect more quickly and can be easier to handle in certain magnetic rod or microplate formats.

Magtivio’s range allows developers to optimize these properties experimentally.

Why Magtivio Ranks Ninth

Magtivio is one of the strongest suppliers in this list for bead screening and protocol engineering.

It ranks ninth mainly because it has less local visibility and support in Taiwan than the higher-ranked suppliers.

What Buyers Should Confirm

Request:

• Trial samples;

• Product concentration;

• Recommended binding chemistry;

• Separation-time data;

• Taiwan shipping conditions;

• Bulk package availability;

• OEM services;

• Product-change notification.

10. AMD Biotech

AMD Biotech supplies Auto-Mag D-1 silica-coated magnetic beads for DNA and RNA extraction.

The beads are standalone raw materials rather than components that can only be used in a closed instrument.

Main Product Specifications

Auto-Mag D-1 consists of superparamagnetic iron oxide particles enclosed within a silica layer.

The manufacturer lists:

• Silica hydroxyl surface;

• Approximately 900 nm average diameter;

• 50 mg/mL concentration;

• Superparamagnetic behavior;

• 5 mL, 50 mL and 500 mL packages;

• Ambient-temperature shipping;

• 2–8°C storage after receipt.

Main Applications

Auto-Mag D-1 can be evaluated for:

• Genomic DNA extraction;

• RNA extraction;

• Plasmid DNA purification;

• Whole-blood DNA;

• Plant and microbial samples;

• qPCR preparation;

• Sequencing;

• Automated extraction.

Main Advantages

AMD Biotech provides:

• A clearly defined silica surface;

• Published concentration and particle size;

• Several commercial package volumes;

• Standalone bead supply;

• Product documents and example certificates of analysis;

• Automation compatibility.

Why AMD Biotech Ranks Tenth

AMD Biotech is a practical option for protocol developers requiring a straightforward silica bead with published specifications.

It ranks tenth because its global commercial infrastructure and Taiwan-specific support appear less extensive than those of the larger suppliers.

What Buyers Should Confirm

Confirm:

• Current certificate of analysis;

• DNase and RNase controls;

• Particle-size distribution;

• Binding capacity;

• Taiwan shipping time;

• Import documentation;

• Manufacturing capacity;

• Formal change control;

• OEM conditions.

How Silica Magnetic Beads Work

Silica magnetic bead extraction normally includes four main stages:

1. Sample lysis;

2. Nucleic acid binding;

3. Magnetic washing;

4. Nucleic acid elution.

Step 1: Sample Lysis

The sample is treated to release DNA or RNA.

The lysis process may use:

• Chaotropic salts;

• Detergents;

• Proteinase K;

• Reducing agents;

• Heating;

• Mechanical homogenization;

• Bead beating.

The correct lysis method depends on whether the sample contains blood cells, viruses, bacteria, fungi, tissue, plants, stool or FFPE material.

Step 2: Binding to the Silica Surface

Under appropriate high-salt, low-water-activity or chaotropic conditions, DNA and RNA adsorb onto the silica surface.

The bead suspension is mixed with the lysate so that the available silica surface contacts the released nucleic acids.

Binding efficiency depends on:

• pH;

• Salt composition;

• Alcohol concentration;

• Bead surface area;

• Mixing intensity;

• Binding time;

• Sample matrix.

A 2025 study of magnetic silica extraction found that binding pH, bead movement, binding duration and elution conditions all influence final nucleic acid yield.

Step 3: Magnetic Washing

A magnet collects the beads while the surrounding liquid is removed.

Wash buffers then remove:

• Proteins;

• Lipids;

• Salts;

• Cellular debris;

• Heme;

• Guanidinium residues;

• PCR inhibitors;

• Unbound nucleic acids.

The beads must redisperse effectively during washing. A tightly compacted bead pellet may reduce contaminant removal.

Step 4: Elution

Low-salt water or buffer releases the purified DNA or RNA from the silica surface.

The magnet retains the beads while the eluate is transferred to a clean vessel.

Elution performance can be influenced by:

• Buffer pH;

• Elution temperature;

• Incubation time;

• Mixing;

• Elution volume;

• Bead drying.

Silica Magnetic Beads vs Carboxyl Magnetic Beads

Silica magnetic beads and carboxyl magnetic beads are not automatically interchangeable.

Silica Magnetic Beads

Silica particles commonly bind nucleic acids under chaotropic salt and alcohol conditions.

They are frequently used for:

• Raw clinical samples;

• Total DNA;

• Total RNA;

• Viral nucleic acids;

• Genomic DNA;

• Pathogen extraction.

Carboxyl Magnetic Beads

Carboxyl beads are commonly used with PEG and salt systems.

They are often selected for:

• PCR cleanup;

• NGS library cleanup;

• DNA size selection;

• Concentration of purified nucleic acids;

• SPRI-style workflows.

Some carboxyl particles can be adapted to raw-sample extraction, but they should not be described as silica beads unless the surface chemistry has been verified.

Best Manufacturers by Application

Best for Taiwan-Based Integrated Extraction Systems

Recommended suppliers:

• TANBead;

• GeneReach Biotechnology.

These companies combine magnetic extraction chemistry with Taiwan-based instruments and reagents.

They may be preferable when local installation, service and ready-to-use consumables are required.

Best for Standalone Raw Silica Magnetic Beads

Recommended suppliers:

• SANYU GROUP;

• Cytiva;

• Thermo Fisher Scientific;

• Magtivio;

• AMD Biotech.

These companies are relevant to developers who want to formulate their own buffers or manufacture extraction kits.

Best for Viral DNA and RNA Extraction

Recommended suppliers:

• TANBead;

• Thermo Fisher Scientific;

• GeneReach;

• New England Biolabs;

• SANYU GROUP;

• Cytiva.

The evaluation should include:

• Low viral load;

• RNA stability;

• Carrier-RNA compatibility;

• Swab transport medium;

• Plasma or serum;

• RT-qPCR cycle threshold;

• Internal-control recovery.

Best for Cell-Free DNA

Recommended suppliers:

• TANBead;

• Cytiva;

• New England Biolabs;

• SANYU GROUP.

cfDNA extraction should be evaluated using clinically relevant short-fragment controls rather than only high-molecular-weight genomic DNA.

Important endpoints include:

• Short-fragment recovery;

• Elution volume;

• Background genomic DNA;

• Bead carryover;

• Reproducibility at low input;

• Digital PCR or NGS performance.

Best for FFPE Samples

Recommended suppliers:

• TANBead;

• QIAGEN;

• SANYU GROUP;

• Promega.

The quality of FFPE extraction depends heavily on deparaffinization, protein digestion, cross-link reversal and inhibitor removal.

The bead alone cannot compensate for inadequate sample pretreatment.

Best for Whole-Blood Genomic DNA

Recommended suppliers:

• TANBead;

• GeneReach;

• Thermo Fisher Scientific;

• QIAGEN;

• Promega;

• SANYU GROUP.

Evaluate:

• EDTA and citrate compatibility;

• Sample volume;

• Heme removal;

• Yield;

• Purity;

• DNA integrity;

• Downstream PCR performance.

Best for High-Molecular-Weight DNA

Recommended suppliers:

• QIAGEN;

• Magtivio;

• SANYU GROUP.

HMW DNA requires gentle lysis and mixing. Aggressive vortexing, rapid magnetic rod movement or excessive bead drying can fragment the DNA.

Best for Food, Plant and Environmental Samples

Recommended suppliers:

• TANBead;

• GeneReach;

• QIAGEN;

• Promega;

• SANYU GROUP;

• Magtivio.

These sample types may contain polysaccharides, polyphenols, fats and other inhibitors. Buffer formulation and pretreatment can be more important than nominal bead capacity.

Best for Custom OEM Extraction Kits

Recommended suppliers:

• SANYU GROUP;

• TANBead;

• Cytiva;

• Thermo Fisher Scientific;

• Magtivio;

• AMD Biotech.

The best partner depends on whether the buyer requires raw beads, optimized buffers, prefilled plates, private labeling, instrument integration or full contract manufacturing.

How to Choose Silica Magnetic Beads

Start With the Intended Sample

Define whether the bead will process:

• Whole blood;

• Plasma;

• Serum;

• Swabs;

• Saliva;

• Tissue;

• FFPE tissue;

• Stool;

• Plants;

• Food;

• Environmental samples;

• Cell culture;

• Purified PCR products.

A bead optimized using whole blood may not recover cfDNA efficiently from plasma.

Define the Target Nucleic Acid

Determine whether the process must isolate:

• Genomic DNA;

• Viral DNA;

• Viral RNA;

• Total RNA;

• Total nucleic acid;

• Cell-free DNA;

• Plasmid DNA;

• High-molecular-weight DNA;

• Short DNA fragments.

Compare Particle Diameter

Particle diameter influences:

• Surface area;

• Binding capacity;

• Sedimentation;

• Magnetic collection;

• Mixing;

• Bead carryover;

• Microfluidic compatibility.

Smaller beads often provide more surface area but may require longer magnetic collection.

Larger beads may separate quickly but can settle rapidly in reagent reservoirs.

Evaluate Magnetic Response

Measure magnetic performance in the actual plate, tube or cartridge.

Compare:

• Time to clear the supernatant;

• Pellet position;

• Pellet compactness;

• Bead loss;

• Redispersion after collection;

• Performance in viscous lysates.

Evaluate Suspension Stability

Automated dispensing requires consistent bead concentration.

Test:

• Sedimentation over the run time;

• Concentration in the first and last wells;

• Requirement for reservoir mixing;

• Bottle resuspension;

• Pipetting accuracy;

• Tip blockage.

Measure Recovery With a Functional Assay

Spectrophotometric concentration is not sufficient.

Use:

• Fluorometric quantification;

• qPCR;

• RT-qPCR;

• Digital PCR;

• Fragment analysis;

• Gel electrophoresis;

• NGS library yield.

Test Inhibitor Removal

A high apparent yield can still produce poor PCR results if the eluate contains:

• Ethanol;

• Guanidinium salts;

• Heme;

• Proteins;

• Polysaccharides;

• Phenolic compounds;

• Magnetic particles.

Validate Several Production Lots

Test at least three representative commercial lots during supplier qualification.

Compare:

• Particle size;

• Solids concentration;

• Magnetic response;

• Binding capacity;

• Nucleic acid recovery;

• Purity;

• Downstream amplification;

• Bead carryover;

• Suspension stability.

Taiwan TFDA and Import Considerations

Intended Use Determines Regulatory Treatment

TFDA’s IVD definition covers reagents, instruments and systems used to collect, prepare or test human specimens for diagnostic purposes. Medical devices are classified by risk, intended use, instructions and working principle.

A raw bead sold for laboratory research or further manufacturing may not follow the same pathway as a finished IVD extraction kit.

The Taiwanese manufacturer or importer should confirm the applicable classification instead of relying only on the foreign supplier’s description.

Imported Medical Device Authorization

For regulated imported medical devices, TFDA guidance requires authorization documentation from the original foreign manufacturer identifying the Taiwan agent and relevant product information.

This requirement may become relevant when purchasing a finished IVD extraction reagent or system, rather than an unrestricted industrial raw material.

Importer Qualification

TFDA states that businesses importing medical devices must have the appropriate medical device dealer permit covering import activities.

Before appointing a distributor, verify:

• Import authorization;

• Scope of business permit;

• Technical competence;

• Local storage;

• Complaint handling;

• Product traceability;

• Ability to communicate manufacturer changes.

Quality Management Documentation

For regulated medical devices, TFDA’s framework includes requirements related to medical device quality management systems and documentation for foreign manufacturers.

Raw-bead buyers should still request quality-system information even when the material itself is not registered as a finished medical device.

Traditional Chinese Labeling

TFDA guidance states that regulated medical devices manufactured or imported for sale require Chinese labeling and instructions, with imported instructions based on the original manufacturer’s materials.

For raw materials used internally in manufacturing, the exact requirements may differ, but purchasing and regulatory teams should confirm whether Traditional Chinese documents are needed.

Taiwan Supplier Qualification Checklist

Particle Specifications

• What is the nominal bead diameter?

• What is the permitted size range?

• Which method is used to measure particle size?

• What is the solids concentration?

• What is the magnetic-core material?

• Is the surface true silica or silica-like?

• What is the magnetic separation time?

• How rapidly do the beads sediment?

• Can the beads be completely redispersed?

Nucleic Acid Performance

• What is the DNA-binding capacity?

• What is the RNA-binding capacity?

• Which binding chemistry is recommended?

• What fragment-size range can be recovered?

• Has viral RNA been tested?

• Has cfDNA been tested?

• What is the minimum elution volume?

• Is bead carryover measured?

• Are DNase and RNase controls available?

Automation Compatibility

• Can the beads be used on magnetic rod instruments?

• Are they compatible with 96-well plates?

• Can they be dispensed from a reservoir?

• Is continuous reagent mixing required?

• Are extraction scripts available?

• Can the product be used in microfluidic cartridges?

• Is the pellet compatible with the instrument magnet position?

Quality Documents

• Is a certificate of analysis supplied?

• Is a detailed product specification available?

• Are lots fully traceable?

• Are retention samples maintained?

• Is stability data available?

• Is there a formal change-notification process?

• Can the supplier sign a quality agreement?

• Is the manufacturing location disclosed?

Commercial Supply

• Are evaluation samples available?

• What is the minimum order quantity?

• Are 100 mL or 1,000 mL packages available?

• Can the supplier support pilot production?

• What is the commercial batch capacity?

• Can a production lot be reserved?

• Is private labeling available?

• Can the supplier maintain safety stock?

• What is the lead time to Taiwan?

Taiwan Import Support

• Can the supplier provide a commercial invoice?

• Is the country of origin stated?

• Can the manufacturer issue an authorization letter?

• Are manufacturing and free-sale documents available when applicable?

• Can documentation be provided in English?

• Is Traditional Chinese translation support available?

• Are storage and shipping conditions clearly documented?

Frequently Asked Questions

What Are Silica Magnetic Beads?

Silica magnetic beads are magnetically responsive particles with a silica or silica-like nucleic acid-binding surface.

They allow DNA or RNA to be bound, magnetically separated, washed and eluted without centrifuging the solid phase during each step.

Which Taiwan Company Manufactures Silica Magnetic Bead Extraction Systems?

TANBead and GeneReach are two important Taiwan-based suppliers of magnetic bead nucleic acid extraction technologies.

TANBead offers magnetic particles, reagent kits and Maelstrom extraction instruments. GeneReach uses silica-coated magnetic beads in its taco extraction reagents and automated systems.

Which Company Is Ranked First?

TANBead ranks first because it combines Taiwan-based bead technology, extraction reagents, automated instruments, broad sample coverage and OEM capabilities.

The best supplier for a specific project may still differ depending on whether the customer wants raw beads or a complete system.

Why Is SANYU Ranked Second?

SANYU ranks second because it supplies standalone silica-coated magnetic beads in nano- and micron-scale formats and supports customized concentration, packaging and OEM projects.

It is particularly relevant to Taiwanese companies that want to develop their own buffer chemistry or commercial extraction reagents.

SANYU is the only Chinese manufacturer included in the ranking.

Which Supplier Is Best for Standalone Silica Magnetic Beads?

Relevant options include:

• SANYU GROUP;

• Cytiva;

• Thermo Fisher Scientific;

• QIAGEN;

• Promega;

• New England Biolabs;

• Magtivio;

• AMD Biotech.

The best choice depends on sample type, particle diameter, binding chemistry, automation and commercial documentation.

Which Beads Are Best for Viral RNA?

Relevant products include:

• TANBead viral extraction reagents;

• Thermo Fisher Dynabeads MyOne SILANE;

• NEB Monarch Mag Beads M1;

• SANYU silica magnetic beads;

• Cytiva SeraSil-Mag;

• GeneReach taco DNA/RNA reagents.

Each option must be tested using the intended viral sample, transport medium, carrier RNA and RT-qPCR assay.

Which Beads Are Best for cfDNA?

TANBead, Cytiva, NEB and suitable SANYU bead formats may be evaluated for cfDNA.

The developer should measure the recovery of short DNA fragments directly. Total DNA concentration can be misleading if high-molecular-weight genomic DNA contamination is present.

Can Silica Magnetic Beads Be Used on Any Extraction Instrument?

Not automatically.

Compatibility depends on:

• Magnetic strength;

• Magnet location;

• Plate geometry;

• Particle size;

• Mixing speed;

• Bead concentration;

• Wash volume;

• Pellet behavior.

The protocol must be optimized for the intended instrument.

Are Silica Magnetic Beads Better Than Spin Columns?

Silica magnetic beads are generally easier to automate and scale to 24-, 48- or 96-sample workflows.

Spin columns may remain convenient for low-throughput manual extraction.

Performance depends on the complete chemistry and sample type rather than the solid phase alone.

Can One Bead Extract Both DNA and RNA?

Many silica magnetic beads can bind both DNA and RNA.

Selectivity is controlled largely by:

• Lysis chemistry;

• Binding buffer;

• Alcohol concentration;

• Washing;

• DNase or RNase treatment;

• Elution conditions.

Are Raw Silica Beads TFDA Approved?

A raw bead does not automatically require or receive the same approval as a finished IVD extraction kit.

Regulatory treatment depends on intended use, labeling, claims, packaging and commercial presentation. Taiwanese companies should determine the classification with their regulatory team or TFDA where necessary.

Can RUO Beads Be Used During IVD Development?

RUO beads can be useful during feasibility and assay optimization.

Before commercialization, the buyer should confirm:

• Long-term supply;

• Release specifications;

• Quality documentation;

• Lot traceability;

• Change control;

• Manufacturer support for the intended use.

How Many Lots Should Be Tested?

At least three representative production lots are a practical starting point.

More lots may be required when particle diameter, silica coating, magnetic response or background contamination has a critical effect on the finished assay.

Should a Taiwanese Buyer Use a Local Supplier?

A local platform supplier may provide faster communication, installation, service and consumable delivery.

An international raw-bead manufacturer may offer greater formulation freedom, broader particle options or more competitive bulk manufacturing.

Many companies use a combination of local platform support and internationally sourced critical raw materials.

Final Recommendations

TANBead ranks first for Taiwanese customers seeking a locally manufactured, integrated magnetic bead extraction platform covering viral nucleic acids, cfDNA, FFPE, blood, pathogens, food and environmental samples.

SANYU GROUP ranks second and is a Chinese competitive choice for standalone silica magnetic beads, customized particle specifications, bulk packaging and OEM extraction-reagent development.

GeneReach Biotechnology ranks third for Taiwan-based silica-coated magnetic bead reagents integrated with taco and POCKIT systems.

Cytiva is a strong option for well-characterized standalone SeraSil-Mag beads, especially for low-input DNA and liquid biopsy development.

Thermo Fisher Scientific is particularly relevant to viral nucleic acid extraction, uniform silica-like Dynabeads and automated OEM workflows.

QIAGEN combines MagAttract particles with extensive buffer systems and high-molecular-weight DNA applications.

Promega provides established MagneSil particle technology for genomic DNA, plasmid, food and sequencing workflows.

New England Biolabs offers differentiated M1 and M2 silica-coated beads for low-input and general nucleic acid purification.

Magtivio is valuable for developers who need to compare multiple bead sizes or design microfluidic and automated protocols.

AMD Biotech provides a clearly specified, standalone silica-coated bead in laboratory and bulk package sizes.

Before approving a supplier, Taiwanese buyers should compare multiple bead products and at least three commercial lots using the exact sample matrix, extraction buffers, magnetic instrument and downstream PCR or sequencing assay intended for the final product.