Core-Shell Technology for Virus Purification

InertShell Core-Shell Chromatography Resin

For Adenoviridae ADV Purification

Biovanix InertShell Chromatography Resin is a revolutionary core-shell technology-based resin designed for the purification of viruses and large biomolecules. Combining size-exclusion separation with binding chromatography, this advanced resin efficiently captures and isolates large biomolecules while allowing smaller contaminants to pass through and bind within the core.

This dual functionality ensures high-purity outcomes in downstream processing.

20 mg/mL

BSA Binding Capacity

≤1.0 MPa

Max Pressure

pH 3–13

Wide pH Stability

30+

Reuse Cycles

How It Works

Dual-Function Core-Shell Architecture

Combining size-exclusion and binding chromatography in a single resin for unmatched purification efficiency.

Size-Exclusion + Binding in One Step

The outer shell is hydrophilic and neutral with 50-100 nm pores. Large biomolecules (e.g., inactivated viruses) are too large to penetrate the shell and are collected directly in the flow-through fraction (FT mode).

Smaller contaminants (<700 kDa) diffuse through the shell into the macroporous core (200-500 nm), where octylamine ligands provide both anion exchange and hydrophobic interaction to capture and retain impurities.

Key advantage: The thinner shell layer (0.5-1.0 μm vs. competitor’s 5 μm) enables faster mass transfer of impurities to the core for capture, resulting in higher yield of impurity removal and more efficient CIP cleaning.

Product Features

Designed for Demanding Biopurification

Four key capabilities that set InertShell apart in virus and biomolecule downstream processing.

🔬 Core-Shell Technology

Dual Functionality: Simultaneously performs size-exclusion separation and binding chromatography.
Efficient Separation: Large biomolecules (e.g., inactivated viruses) are collected in the flow-through fraction (FT mode), while contaminants (<700 kDa) bind to the internal ligands.
Optimized Design: The outer shell is hydrophilic and neutral, preventing unwanted interactions and ensuring high flow rates.

⚗️ Advanced Material Composition

Polymer Base: Made of polymeric methacrylate microspheres for robust durability and chemical stability.
Active Ligand: Octylamine ligand in the core provides both anion exchange and hydrophobic interaction capabilities.
Porous Structure: The shell has a pore size of 50-100 nm, while the core ranges from 200-500 nm, ensuring efficient separation based on molecular size.

✨ High Purity and Efficiency

Selective Capture: Effectively removes impurities such as host cell proteins, DNA fragments, endotoxins, and albumin.
High Capacity: Designed to handle large-scale purification processes with high efficiency and scalability.

🛡️ Compliance and Safety

Non-Animal Derived: Manufactured using synthetic processes, ensuring compliance with regulatory standards and ethical requirements.
Stable Performance: Reliable across various production scales, ensuring consistent results.

Technical Specifications

Complete Product Specifications

Detailed technical data for method development, validation, and process integration.

Characteristic	Description
Support Matrix	Cross-linked poly(styrene-divinylbenzene)
Average Particle Size	50-150 μm
Average Pore Size	200 nm (core); 50-100 nm (shell)
Surface Functionality	poly(dT) 25mer with proprietary linker
Ligand Density	0.10-0.20 mmol/mL
Mechanical Resistance	70 bar (1,000 psi; 7 MPa)
Thermal Stability	Allows sample denaturing at 65°C if needed
pH Range	2-13
Ionic Strength Range	0 to 5 M, all common salts
Chemical Resistance	Common agents for mRNA purification, include 0.5 M NaOH, 2 M MgCl₂, 20 mM EDTA. Water, 0 to 100% alcohol, acetonitrile, 2 M acetic acid, 1 M HCl, and other common organic solvents
Storage	18-20% ethanol

Competitive Edge

Biovanix InertShell vs. Competitor 700

Direct performance comparison demonstrates clear advantages across key parameters.

	Biovanix Inert Shell	Competitor 700
Matrix	Polyacrylate	Highly cross‑linked agarose
Ligand	Octylamine	Octylamine
Average particle size	50-150 μm	50-150 μm
Density of ligand	0.10-0.20 mmol/mL	0.04-0.085 mmol/mL
Binding capacity¹	20 mg BSA/mL resin	12 mg BSA/mL resin
Operational pressure	≤1.0 MPa	≤0.3 MPa
Operational flow rate	100-600 cm/h	100-600 cm/h
pH stability	3-13	3-13
Temperature	4-30℃	4-30℃
Chemical stability	All commonly used aqueous buffers, 1 M sodium hydroxide (NaOH)², 6 M guanidine hydrochloride, 30% isopropanol, and 70% ethanol.
Storage	20% ethanol at 4°C to 25 ℃

Dynamic binding capacity measured at 5% breakthrough with 76 cm/h on φ10×13 mm, 1 mL columns. The buffer was 1.0 mg/mL BSA 50 mM NaCl, pH 0.
No significant changes in ionic capacity and carbon content after storage 1 week in 1 M NaOH at 25°C.

2.5×

Higher Ligand Density

0.10-0.20 vs. 0.04-0.085 mmol/mL

1.67×

Higher Binding Capacity

20 vs. 12 mg BSA/mL resin

3.3×

Higher Pressure Tolerance

1.0 vs. 0.3 MPa

Thinner Shell, Faster Mass Transfer

Compared with Competitor 700, the thickness of the core in Biovanix InertShell (0.5-1.0 μm) is significantly smaller than Competitor 700 (5 μm). This thinner shell is conducive to the rapid mass transfer of impure proteins to the medium core for capture, including host cell proteins, DNA fragments, endotoxin, and serum. Biovanix InertShell delivers a higher yield of impurity removal. With the macroporous structure (200-500 nm) of the core, InertShell can quickly remove captured impurities during CIP, and demonstrates a longer service life — in animal vaccine studies, consistent performance for more than 30 reuse cycles.

Benefits at a Glance

Why Biovanix InertShell Resin

Purpose-built for high-purity virus and biomolecule downstream processing.

⚡

High Efficiency

Rapid and efficient mRNA purification.

📈

Scalable Process

Easily adaptable to large-scale manufacturing.

🛡️

Regulatory Compliance

Non-animal derived and synthetic manufacturing process.

💰

Cost-Effective

Simplified workflow reduces operational complexity and costs.

🔄

Long Service Life

30+ reuse cycles with consistent performance.

Applications

Built for the Future of Biopharmaceuticals

From vaccine production to gene therapy, InertShell supports your most critical purification workflows.

Virus Purification

Effective isolation of inactivated viruses for vaccines and gene therapies.

Large Biomolecule Separation

Suitable for the purification of large proteins and complexes.

Host Cell Protein Removal

Efficient elimination of host cell proteins and other impurities.

Vaccine Production

Streamlined downstream processing for mRNA vaccines and viral vector-based vaccines.

Gene Therapy

Scalable production of viral vectors for gene therapy applications.

Why Choose Biovanix

Your Trusted Partner in Chromatography

① Enhanced Purity

Efficient removal of impurities to achieve ultra-high purity in virus and biomolecule purification.

② Dual Mode Operation

Combines size-exclusion and binding chromatography for versatile and precise control.

③ Scalable Solution

Ideal for both lab-scale and large-scale manufacturing processes.

④ Cost-Effective

Simplified process flows and high efficiency reduce operational costs and improve productivity.

⑤ Regulatory Compliance

Non-animal derived and synthetic manufacturing ensure adherence to global biopharmaceutical standards.

Frequently Asked Questions

InertShell Resin FAQ

Common questions about core-shell chromatography for virus and biomolecule purification.

What is InertShell Core-Shell Chromatography Resin and how does it work?

Biovanix InertShell is a core-shell chromatography resin designed for the purification of viruses and large biomolecules. It combines size-exclusion separation with binding chromatography in a single step. The outer shell is hydrophilic and neutral with 50-100 nm pores, while the inner core features macropores of 200-500 nm functionalized with octylamine ligands. Large biomolecules like inactivated viruses pass through in the flow-through fraction, while smaller contaminants (<700 kDa) including host cell proteins, DNA fragments, and endotoxins bind to the internal ligands.

What is the difference between core-shell and fully porous chromatography resins?

Core-shell resins feature a non-porous solid core surrounded by a thin porous outer shell. This architecture reduces mass transfer resistance compared to fully porous particles, enabling faster flow rates with lower backpressure. The reduced diffusion path means analytes spend less time diffusing in and out of pores, resulting in sharper peaks, higher resolution, and shorter processing times. Biovanix InertShell further enhances this by using a polymeric methacrylate base rather than silica, providing superior chemical stability across pH 3-13.

What applications is InertShell resin best suited for?

InertShell resin is optimized for five key applications: (1) Virus purification — efficient isolation of inactivated viruses for vaccines and gene therapies; (2) Large biomolecule separation — purification of large proteins and complexes; (3) Host cell protein (HCP) removal — efficient elimination of HCPs and other process impurities; (4) Vaccine production — streamlined downstream processing for mRNA vaccines and viral vector-based vaccines; (5) Gene therapy — scalable production of viral vectors. It is particularly suited for adenovirus (ADV) purification.

How does InertShell compare to competing core-shell resins?

Compared to Competitor 700 (agarose-based), Biovanix InertShell offers several advantages: (1) 1.67× higher binding capacity (20 mg BSA/mL vs. 12 mg BSA/mL); (2) 3.3× higher operational pressure tolerance (1.0 MPa vs. 0.3 MPa); (3) 2.5× higher ligand density (0.10-0.20 mmol/mL vs. 0.04-0.085 mmol/mL); (4) Thinner shell layer (0.5-1.0 μm vs. 5 μm) enabling faster mass transfer of impurities to the core for capture; (5) Polymeric methacrylate base provides greater chemical stability than agarose; (6) Demonstrated reusable performance of 30+ cycles with minimal property changes in animal vaccine applications.

What is the recommended flow rate for InertShell resin?

Biovanix InertShell supports operational flow rates of 100-600 cm/h at pressures up to 1.0 MPa (approximately 10 bar). The rigid polymeric methacrylate matrix maintains structural integrity even at elevated flow rates. Users should adjust flow rate depending on the specific application and performance requirements, while ensuring the upper pressure limitation is not exceeded. The core-shell architecture ensures efficient mass transfer even at high linear velocities.

Can InertShell resin be reused, and how do I clean it?

Yes, InertShell resin is designed for multiple reuse cycles. The resin demonstrates excellent chemical stability and can withstand cleaning with 1 M NaOH (no significant changes in ionic capacity and carbon content after 1 week storage in 1 M NaOH at 25°C), 6 M guanidine hydrochloride, 30% isopropanol, and 70% ethanol. The macroporous core structure (200-500 nm) enables rapid removal of captured impurities during CIP. In animal vaccine purification studies, the resin has been demonstrated to maintain consistent performance over 30+ reuse cycles.

What buffer and storage conditions are required?

InertShell resin is compatible with all commonly used aqueous buffers, 1 M NaOH, 6 M guanidine hydrochloride, 30% isopropanol, and 70% ethanol. It operates across a pH range of 3-13 and ionic strength range of 0 to 5 M. Operating temperature range is 4-30°C. For storage, keep the resin in 20% ethanol at 4°C to 25°C. Do not expose to strong oxidizers (hypochlorite), oxidizing acids (nitric acid), strong reducing agents (sulfite), acetone, THF, or benzyl alcohol.

How does InertShell achieve dual functionality in size-exclusion and binding chromatography?

InertShell achieves dual functionality through its unique core-shell architecture. The outer shell is hydrophilic and neutral with small pores (50-100 nm), which prevents large biomolecules like viruses from entering and interacting with the surface. These large molecules are collected in the flow-through fraction (FT mode). Meanwhile, the inner core has large macropores (200-500 nm) functionalized with octylamine ligands that provide both anion exchange and hydrophobic interaction capabilities, capturing smaller contaminants (<700 kDa) including host cell proteins, DNA fragments, endotoxins, and albumin.

Is InertShell resin suitable for GMP manufacturing?

Yes, InertShell resin is manufactured using synthetic processes and is non-animal derived, ensuring compliance with regulatory standards and ethical requirements. This makes it suitable for use in GMP manufacturing environments for vaccine production and gene therapy applications. The consistent performance across various production scales and the demonstrated reusability (30+ cycles) support cost-effective and compliant large-scale biopharmaceutical manufacturing.

What particle size does InertShell use and why does it matter?

InertShell resin uses particles with an average size of 50-150 μm. The core-shell design within each particle is key: the thin outer shell (0.5-1.0 μm thickness) with small pores creates the size-exclusion effect for large biomolecules, while the macroporous core provides high-capacity binding for smaller impurities. This dual-size architecture within each particle enables the simultaneous size-based separation and affinity-based capture that distinguishes InertShell from conventional single-mechanism resins.

How does InertShell compare to agarose-based resins for virus purification?

InertShell’s polymeric methacrylate base offers significant advantages over traditional agarose-based resins: (1) Higher mechanical strength — supports pressures up to 1.0 MPa vs. 0.3 MPa for agarose, enabling faster processing; (2) Wider chemical compatibility — stable with NaOH, guanidine hydrochloride, organic solvents; (3) Higher binding capacity — 20 mg BSA/mL vs. 12 mg BSA/mL; (4) Higher ligand density — 0.10-0.20 mmol/mL vs. 0.04-0.085 mmol/mL; (5) Longer service life — demonstrated 30+ reuse cycles with consistent performance; (6) Faster mass transfer — thinner shell layer (0.5-1.0 μm vs. 5 μm) allows quicker impurity capture and CIP cleaning.

What impurities can InertShell resin remove from my sample?

InertShell resin effectively removes a broad range of process-related impurities while retaining your target large biomolecules in the flow-through: (1) Host cell proteins (HCPs); (2) DNA fragments; (3) Endotoxins; (4) Albumin; (5) Other contaminants smaller than 700 kDa. The octylamine ligand in the core provides both anion exchange and hydrophobic interaction mechanisms, enabling multi-modal impurity capture. This comprehensive impurity removal in a single step significantly simplifies downstream processing workflows.

Complete Chromatography Solutions from Biovanix

Pair Oligo dT(25) Resin with our full range of chromatography hardware, media, and systems.

Agarose Chromatography Media

High-performance agarose-based resins for protein and biomolecule purification

Ready to Transform Your Virus Purification Workflow?

Contact our application scientists for personalized technical support, sample testing, or volume pricing on InertShell resin.