Omnifit EZ Series Axial-Compression Protein Purification Columns (Sanotac OEM, UK-Manufactured)
| Brand | Sanotac |
|---|---|
| Origin | United Kingdom |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Import Status | Imported |
| Model | 006EZ-06-25-AF |
| Max Operating Pressure (6.6 mm ID) | 900 psi (60 bar) |
| Temperature Range | 4–40 °C |
| pH Range | 1–14 |
| Column Tube Material | Borosilicate Glass |
| End Fittings | PTFE, ETFE, Acetal |
| O-Ring Material | FKM/FPM (standard), Chemraz® (SolventPlus variant) |
| Sieve Plate | PE (standard) or PTFE (SolventPlus) |
| Compatible Systems | GE AKTA, Sanotac Biolot, Bio-Rad NGC, and other medium-pressure chromatography platforms |
Overview
The Omnifit EZ Series Axial-Compression Protein Purification Columns are precision-engineered, modular, medium-pressure chromatography columns manufactured in the United Kingdom by Omnifit — a globally recognized specialist in high-integrity lab-scale chromatographic hardware. Designed for reproducible protein purification under controlled axial compression, these columns operate on the principle of mechanically adjustable bed consolidation to eliminate void formation and ensure uniform flow distribution across the packed stationary phase. Unlike fixed-length columns, the EZ-AF (one-end adjustable) and EZ-AA (dual-end adjustable) configurations enable real-time optimization of column packing density — critical for maintaining resolution, minimizing band broadening, and extending resin lifetime during repeated loading cycles. The columns are compatible with both aqueous and organic solvent systems, supporting applications ranging from ion exchange and size exclusion chromatography (SEC) to reversed-phase purification of denatured proteins or peptides. Their borosilicate glass construction provides optical clarity for visual bed inspection, while chemically inert wetted materials ensure compatibility with stringent GMP/GLP workflows.
Key Features
- Three mechanical configurations: Fixed-Fixed (FF), One-End Adjustable (AF), and Dual-End Adjustable (AA) — enabling precise control over column bed compression and packing stability.
- Borosilicate glass column body rated for pressures up to 900 psi (60 bar) at 6.6 mm internal diameter; pressure rating scales inversely with ID per standardized engineering specifications.
- Chemically resistant wetted path: PTFE or Chemraz® O-rings, PTFE or polyethylene (PE) frits, acetal compression nuts, and ETFE end fittings (SolventPlus variant) — validated for use with common LC solvents including DMSO, DMF, chloroform, pyridine, and 10% NaOH/HCl (within defined concentration limits).
- Modular, tool-free assembly: Integrated 1/4″-28 UNF threaded connections with PTFE tubing (2 m and 0.5 m lengths included) simplify integration into existing chromatography manifolds.
- Temperature-stable operation from 4 °C to 40 °C and pH resilience across 1–14 — suitable for native and denaturing purification protocols.
- Traceable manufacturing: Each column carries a unique alphanumeric identifier aligned with Omnifit’s UK-based quality control documentation, supporting audit readiness for ISO 13485 and FDA 21 CFR Part 11–compliant environments.
Sample Compatibility & Compliance
These columns are validated for use with standard protein purification resins including agarose-, sepharose-, and methacrylate-based media (e.g., SP Sepharose, Q Sepharose, Ni-NTA Agarose, and Capto系列产品). They support both gravity-fed and pump-driven operation across medium-pressure ranges (up to 20 bar for ≥25 mm ID columns), making them suitable for preparative SEC, affinity capture, and intermediate-purity polishing steps. The glass/PTFE/ETFE architecture complies with USP Class VI biocompatibility requirements and meets material compatibility criteria outlined in ASTM D543 and ISO 10993-5 for non-implantable device components. Solvent resistance data is documented per Omnifit’s Chemical Compatibility Guide v4.2, with explicit exclusions for >10% acetic acid, ketones (e.g., acetone), aromatic phenols, and strong oxidizing agents — consistent with industry-standard handling protocols for chromatographic hardware.
Software & Data Management
While the Omnifit EZ columns are hardware-only components without embedded electronics, their mechanical design supports full traceability within regulated chromatography software ecosystems. When deployed with GE Cytiva UNICORN, Bio-Rad ChromLab, or Sanotac ChromaLink systems, column geometry (ID, length, compression state) and operational parameters (flow rate, pressure, gradient profile) are recorded as metadata in method files. The standardized 1/4″-28 UNF interface ensures mechanical interoperability with pressure transducers and fraction collectors equipped with digital I/O. For GLP/GMP compliance, users may log column usage history—including cycle count, cleaning-in-place (CIP) events, and pressure decay tests—in electronic lab notebooks (ELNs) integrated with LIMS platforms. No firmware or proprietary drivers are required.
Applications
- Scalable protein purification from cell lysates using immobilized metal affinity chromatography (IMAC) or antibody-based capture matrices.
- Buffer exchange and desalting via size exclusion chromatography under low-shear conditions.
- Method development for monoclonal antibody (mAb) polishing steps where axial compression mitigates channeling in high-viscosity feed streams.
- Continuous flow chemistry coupling — e.g., in-line enzymatic digestion followed by capture on immobilized trypsin or Glu-C columns.
- Educational and pilot-scale process characterization where visual bed integrity and manual packing verification are essential quality checkpoints.
FAQ
What distinguishes the AF and AA configurations?
The AF (Axial-Fixed/Adjustable) design fixes one end and adjusts compression at the opposite end; the AA (Axial-Adjustable/Adjustable) allows independent adjustment at both ends — ideal for optimizing bed homogeneity when packing compressible media like soft agarose gels.
Can these columns be sterilized?
Yes — autoclaving at 121 °C for 20 minutes is permissible for glass, PTFE, PE, and acetal components; however, Chemraz® and FKM O-rings require post-sterilization replacement per manufacturer guidelines.
Is validation documentation available?
Omnifit provides material certificates of conformance (CoC), pressure test reports, and chemical compatibility matrices upon request — supporting IQ/OQ protocol development for regulated labs.
How does axial compression improve resolution?
By eliminating interstitial voids and ensuring uniform radial flow velocity, axial compression reduces eddy diffusion and improves plate height (HETP), directly enhancing peak symmetry and theoretical plate count in gradient elution.
Are replacement parts available separately?
Yes — spare frits, O-rings, compression nuts, and end fittings are stocked by Sanotac as OEM-specified consumables (e.g., P/N OMNIFIT-PTFE-FRIT-10MM, OMNIFIT-CHEMRAZ-ORING-KIT).
