GE AKTA Explorer 100 Protein Purification System

Overview

The GE AKTA Explorer 100 Protein Purification System is a benchtop preparative liquid chromatography platform engineered for robust, reproducible, and scalable biomolecule purification in research, process development, and early-stage GMP environments. Built upon the foundational architecture of GE Healthcare’s (now part of Cytiva, with legacy instrumentation supported by Baker Hughes’ life sciences division) AKTA platform, this system implements high-precision gradient formation, real-time multi-parameter monitoring (UV, conductivity, pH, pressure, temperature), and integrated fraction collection — all governed by UNICORN 6 software. Its core operational principle relies on controlled mobile-phase delivery through packed chromatographic columns under defined flow rates and backpressure constraints, enabling separation modalities including ion exchange, size exclusion, hydrophobic interaction, and affinity chromatography. Designed for method transfer across scales, the Explorer 100 supports seamless transition from analytical to pilot-scale purification workflows, particularly when paired with HiScreen prepacked columns and BioProcess resins such as Capto and MabSelect.

Key Features

• BufferPro Automated Buffer Preparation: Integrated four-channel valve enables real-time online mixing of stock solutions (acid, base, salt, water) to generate precise buffer compositions across broad pH ranges (0–14) with automatic temperature and ionic strength compensation — eliminating manual titration and reducing buffer screening time by up to 30 minutes per condition.
• Design of Experiments (DoE) Integration: UNICORN 6 embeds statistically rigorous DoE tools that simultaneously vary multiple parameters (e.g., gradient slope, flow rate, pH, conductivity), significantly reducing experimental runs while enhancing understanding of factor interactions, noise sensitivity, and robustness boundaries.
• Method Editor Workflow: Intuitive drag-and-drop interface for constructing chromatographic methods by assembling predefined step templates (equilibration, load, wash, elute, regeneration); retains full scripting access for advanced users via UNICORN’s native programming language.
• Dual-Pressure Monitoring Architecture: Independent upstream and downstream pressure sensors mounted directly within column valves provide true ΔP measurement across the packed bed — critical for column integrity monitoring, constant-pressure packing, and overpressure protection during method ramp-up.
• UNICORN 6 Regulatory Compliance: Fully compliant with FDA 21 CFR Part 11 requirements, featuring electronic signatures, role-based user permissions, immutable audit trails, secure database storage, and password-protected method locking for unattended operation.
• UniTag & Column Logbook: QR-code-based column tracking system automatically logs run history, cumulative cycles, maximum observed ΔP, cleaning intervals, and maintenance alerts; supports both prepacked columns (e.g., HiScreen) and user-packed columns via printable UniTag labels.

Sample Compatibility & Compliance

The AKTA Explorer 100 accommodates a wide range of sample types including monoclonal antibodies, recombinant proteins, plasmid DNA, viral vectors, and fusion-tagged constructs. It is compatible with standard analytical and semi-preparative columns (1–26 mm ID) and HiScreen prepacked columns (1–10 mL bed volume). The system meets essential laboratory safety and environmental specifications: operating ambient range 4–35 °C, relative humidity 20–95% non-condensing, and electrical supply 100–240 VAC, 50/60 Hz. All hardware components conform to IEC 61010-1 safety standards. For regulated environments, the system supports GLP/GMP-aligned documentation packages, including IQ/OQ protocols and validation support files available through authorized service channels.

Software & Data Management

UNICORN 6 serves as the central control, acquisition, and analysis engine. It employs a relational database structure where all raw data (chromatograms, sensor logs, method files, audit entries) are stored in timestamped, tamper-evident format. Data export adheres to ASTM E1782 (Standard Practice for Data Exchange in Chromatography) and supports CSV, PDF, and native .chn formats. Electronic signature workflows comply with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Audit trails record every user action — from parameter modification to fraction collection trigger — with full traceability to operator ID and system clock. Backup and restore procedures follow ISO/IEC 27001-aligned data retention policies.

Applications

• Early-stage purification process development for therapeutic proteins and mAbs
• High-throughput buffer and gradient screening using DoE-driven experimental design
• Method optimization and robustness testing per ICH Q5A/Q5D guidelines
• Column performance qualification and lifetime monitoring via Column Logbook
• Small-scale GMP-compatible purification under documented SOPs
• Educational training in bioprocess chromatography fundamentals

FAQ

Is the AKTA Explorer 100 compatible with modern BioProcess resins such as Capto and MabSelect?

Yes — its pressure rating (up to 20 MPa) and flow range (0.001–100 mL/min) align with manufacturer-recommended operating envelopes for these resins.
Can UNICORN 6 data be exported for third-party statistical analysis?

Yes — all chromatographic data, sensor logs, and metadata are exportable in standardized formats (CSV, ASCII) suitable for JMP, MATLAB, or Python-based analysis pipelines.
Does the system include validation documentation?

While the instrument ships without factory-issued IQ/OQ reports, comprehensive validation support packages — including protocol templates, test scripts, and compliance checklists — are available through authorized service partners.
What is the typical service interval for preventive maintenance?

Baker Hughes recommends biannual PM visits for systems operating ≥20 hours/week; extended warranty and service agreements include remote diagnostics and priority Labcrew engineer dispatch.
How does the UniTag system handle columns without embedded QR codes?

Users may manually assign UniTags via UNICORN’s Column Manager interface or print adhesive QR labels using standard thermal label printers — each tag links uniquely to column-specific calibration and usage history.