Sanotac Omnifit EZ SolventPlus Medium-Pressure Glass Chromatography Column

Overview

The Sanotac Omnifit EZ SolventPlus Medium-Pressure Glass Chromatography Column is an engineered solution for preparative and analytical-scale liquid chromatography applications requiring robust chemical inertness, precise bed integrity control, and reproducible flow dynamics. Designed and manufactured in the United Kingdom, this column series employs a fundamental principle of axial compression chromatography—where uniform packing density is maintained under operational pressure via mechanical adjustment of column end-fittings—to minimize channeling, bed settling, and band broadening. Its borosilicate glass body provides optical clarity for visual bed inspection and eliminates metal ion leaching, making it particularly suitable for sensitive protein purification, monoclonal antibody (mAb) polishing, and small-molecule API purification where trace metal contamination must be avoided. Rated for pressures up to 8 MPa at 5 mm internal diameter—and scalable to lower pressures across larger diameters—the column supports both medium-pressure (up to ~5 MPa) and high-flow low-pressure (≤2 MPa) operation, bridging the functional gap between analytical HPLC columns and industrial-scale stainless-steel preparative systems.

Key Features

• Borosilicate glass column body with certified low extractables and thermal stability up to 40 °C, enabling compatibility with temperature-sensitive biomolecules and solvent-based gradient elution.
• Full inert fluidic path: PTFE frits (10 µm pore size standard), Chemraz® elastomeric O-rings (superior resistance to swelling in polar aprotic solvents), PEEK™ end fittings, and ETFE compression hardware ensure compatibility with aggressive organic solvents including DMF, DMSO, chloroform, and pyridine—while maintaining full compatibility with aqueous mobile phases across pH 1–14.
• Three mechanical configurations: Fixed-end (FF), single-end adjustable axial compression (AF), and dual-end adjustable axial compression (AA), allowing users to optimize column packing homogeneity for diverse stationary phases—from rigid silica-based resins to compressible polymer matrices such as Sepharose®, Capto™, or SOURCE™ media.
• Precision-machined dimensional tolerances (< ±0.05 mm) guarantee repeatable cartridge insertion, leak-free sealing, and alignment with industry-standard column manifolds used in GE Cytiva AKTA systems, Sanotac Biolot platforms, and Bio-Rad NGC systems.
• Modular accessory kit included: 2.0 m and 0.5 m lengths of 1/16″ OD × 0.020″ ID PTFE tubing with 1/4″–28 UNF ETFE threaded connectors—designed for low-dead-volume, chemically resistant system integration without need for additional adapters.

Sample Compatibility & Compliance

The Omnifit EZ SolventPlus column is routinely deployed in regulated bioprocessing workflows involving recombinant protein capture, viral vector purification, and oligonucleotide desalting. Its material composition meets USP Class VI biocompatibility requirements for extractables and leachables profiling. When operated within specified pressure and temperature limits, the column complies with ISO 13485-aligned manufacturing practices and supports audit-ready documentation for GLP and GMP environments. The absence of stainless steel or aluminum components eliminates risks associated with metal-catalyzed oxidation of cysteine-rich proteins or disulfide scrambling during purification. Column dimensions (ID: 5–50 mm; height: 50–500 mm) accommodate loading volumes from <1 mL to 940 mL, supporting scalability from benchtop screening to pilot-scale process development. Validation protocols—including column backpressure profiling, flow uniformity mapping, and hold-time stability testing—can be executed per ICH Q5A(R2) and Q5D guidelines.

Software & Data Management

While the column itself is hardware-only, its standardized mechanical interface enables seamless integration into chromatography data systems (CDS) compliant with FDA 21 CFR Part 11. When coupled with Sanotac Biolot Control Software, GE Cytiva UNICORN, or Bio-Rad ChromLab, users can assign unique identifiers to individual columns, log packing history, record compression torque values, and archive method-specific pressure/flow profiles. Audit trails automatically capture operator identity, timestamp, and parameter changes—supporting electronic signature enforcement and revision-controlled documentation. Raw pressure transducer outputs from connected systems may be correlated with column performance metrics (e.g., HETP, asymmetry factor) using validated Python- or MATLAB-based post-processing scripts compliant with ASTM E2500-13 standards for analytical instrument qualification.

Applications

• Protein A affinity chromatography for monoclonal antibody capture and intermediate purification.
• Ion exchange chromatography (IEX) of histidine-tagged proteins under native or denaturing conditions.
• Gel filtration (SEC) for aggregate analysis and buffer exchange of therapeutic enzymes.
• Reverse-phase purification of synthetic peptides and small-molecule drug candidates.
• Continuous flow chemistry support for immobilized enzyme reactors and scavenger columns.
• Method development and resin screening under variable pH, conductivity, and organic modifier conditions.

FAQ

What is the maximum recommended operating pressure for the 25 mm ID version?
The 25 mm ID column (model 006EZS-25-10-AF) is rated for continuous operation up to 3.5 MPa; short-term excursions to 4.0 MPa are permissible with prior validation.
Can this column be autoclaved?
No—borosilicate glass and ETFE/PEEK components are not autoclave-compatible; sterilization is achieved via 0.1 M NaOH sanitization followed by extensive equilibration with DI water.
Is axial compression necessary for all applications?
Axial compression is strongly recommended for soft gels (e.g., agarose-based resins) and high-flow operations (>5 mL/min at 25 mm ID); fixed-end columns suffice for rigid silica or polymer beads operated below 1 MPa.
How often should O-rings be replaced?
Chemraz® O-rings exhibit service life exceeding 200 cycles under typical buffer conditions; replacement is advised after exposure to >50 cycles involving chlorinated solvents or strong oxidants.
Does Sanotac provide column packing services?
Yes—Sanotac offers GMP-compliant pre-packed columns with documented resin lot traceability, slurry packing reports, and column performance certificates aligned with USP & EP monographs.