Omnifit EZ SolventPlus Axial-Compression Glass Chromatography Column (Dual-Adjustable End) – Sanotac OEM

Overview

The Omnifit EZ SolventPlus Axial-Compression Glass Chromatography Column (Dual-Adjustable End) is an engineered solution for medium-pressure liquid chromatography (MPLC), preparative-scale protein purification, and continuous-flow chemical synthesis. Designed and manufactured in the UK by Diba (Omnifit® Labware), this column employs axial compression technology—specifically dual-end adjustability—to maintain consistent bed integrity during high-flow or gradient elution conditions. Unlike fixed-length columns, the dual-adjustable configuration allows precise mechanical control of column packing density by independently tuning both upper and lower end fittings, minimizing channeling, bed settling, and void formation over extended operational cycles. The column operates on classical packed-bed chromatography principles, where analyte separation occurs via differential partitioning between a stationary phase (e.g., resin beads) and a mobile phase (aqueous or organic solvent system) under controlled pressure (up to 6 MPa for 6.6 mm ID; up to 8 MPa for 5 mm ID). Its borosilicate glass body ensures optical clarity for visual bed inspection, while its chemically inert fluidic path supports rigorous method development across reversed-phase, ion-exchange, size-exclusion, and affinity chromatography workflows.

Key Features

• Borosilicate glass column tube with high thermal stability (operating range: 4–40 °C) and broad pH compatibility (pH 1–14)
• Dual-end axial compression mechanism enabling independent adjustment of top and bottom end-fittings for optimal bed consolidation and reproducible column performance
• Chemically inert wetted materials: PTFE frits (10 µm pore size standard), Chemraz® O-rings (resistant to aggressive solvents), ETFE end caps and fittings, and PEEK™-compatible hardware
• Full solvent compatibility—including DMSO, DMF, chloroform, dichloroethane, pyridine, formamide, and toluene—validated for reversed-phase applications without degradation or leaching
• Modular design compatible with major protein purification platforms: Cytiva AKTA systems, Sanotac BioLot series, and Bio-Rad NGC high-performance chromatography systems
• Standardized 1/4″-28 UNF threaded connections and included PTFE tubing (1/16″ ID) ensure leak-free integration into existing LC infrastructure

Sample Compatibility & Compliance

The column accommodates a wide range of chromatographic media, including agarose-, silica-, and polymer-based resins (e.g., Sepharose®, Toyopearl®, Source™, and POROS™), with particle sizes from 10 µm to 100 µm. Its construction complies with ISO 8536-4 (glass containers for pharmaceutical use) and meets material safety requirements per USP for extractables and leachables in biopharmaceutical processing. While not certified for GMP manufacturing environments per se, the column’s traceable UK origin, documented material certifications (e.g., Chemraz® lot traceability), and absence of metallic wetted surfaces support GLP-compliant method validation and regulatory filing submissions. It is routinely employed in early-stage process development per ICH Q5A and Q5D guidelines for therapeutic protein purification.

Software & Data Management

As a passive hardware component, the column does not include embedded electronics or firmware. However, it is fully interoperable with chromatography data systems (CDS) used in regulated environments—including Waters Empower, Thermo Chromeleon, and Cytiva UNICORN—when integrated into validated instrument platforms. All mechanical adjustments are manual and documented via operator logs; no electronic audit trail is generated internally. For 21 CFR Part 11 compliance, users must rely on external CDS-level electronic signatures, change control records, and instrument qualification protocols (IQ/OQ/PQ) applied to the host system. Sanotac provides full material declarations (CoA, RoHS, REACH) and dimensional drawings to support equipment qualification packages.

Applications

• Preparative purification of monoclonal antibodies (mAbs), Fc-fusion proteins, and viral vectors under non-denaturing conditions
• Method scouting and scale-up studies for downstream process development in biologics manufacturing
• Small-molecule isolation in natural product chemistry and synthetic intermediate purification
• Continuous-flow hydrogenation, oxidation, and coupling reactions requiring stable catalyst beds
• Quality control testing of excipients and raw materials using isocratic or gradient elution protocols
• Academic and industrial research involving multi-step orthogonal purification strategies (e.g., capture → intermediate purification → polishing)

FAQ

What distinguishes dual-adjustable axial compression from single-end compression?
Dual-adjustable columns allow independent mechanical tuning of both the top and bottom end-fittings, enabling fine control over bed homogeneity and eliminating asymmetric compaction—critical for high-resolution separations and long-term column reusability.
Can this column be sterilized using autoclaving?
No. Borosilicate glass and ETFE/PTFE components are not rated for repeated steam sterilization at 121 °C. Sterilization is achieved via 0.22 µm filtration of solvents and sanitization with 70% ethanol or 0.1 M NaOH followed by thorough equilibration.
Is the column compatible with high-pH cleaning-in-place (CIP) protocols?
Yes. With validated Chemraz® O-rings and PTFE frits, the column withstands sustained exposure to 0.5–1.0 M NaOH at ambient temperature for up to 2 hours—standard for resin sanitization in mAb purification.
How is column volume calculated for method transfer?
Internal volume is determined geometrically: V = π × (ID/2)² × L. For model 006EZS-50-50-AA (50 mm ID × 50 mm length), void volume ≈ 98.2 mL (excluding frit displacement); actual usable volume depends on packing density and resin swelling characteristics.
Does Sanotac supply pre-packed versions of this column?
Sanotac offers custom pre-packed configurations upon request, subject to resin vendor licensing agreements and validation requirements. Standard delivery is empty-column format with full assembly documentation and QC test reports.