KNAUER Bio FPLC Protein Purification System
| Brand | KNAUER |
|---|---|
| Origin | Germany |
| Model | Bio FPLC |
| Pump Flow Ranges | 0.001–10 mL/min (10 mL module), 0.001–50 mL/min (50 mL module), 0.001–1000 mL/min (100–1000 mL modular pump head upgrade) |
| Detector | External flow cell UV-Vis detector with user-removable flow cell |
| Valve Configurations | Buffer selection, column switching, fraction collection |
| System Series | Compact (R&D scale), Pilot (process-scale) |
| Supported Chromatography Modes | Size-exclusion (SEC), Ion-exchange (IEX), Affinity, Hydrophobic Interaction (HIC) |
| Advanced Configuration Option | Simulated Moving Bed (SMB) for continuous purification |
Overview
The KNAUER Bio FPLC Protein Purification System is an engineered solution for high-fidelity chromatographic separation of biomolecules—including recombinant proteins, monoclonal antibodies, peptides, plasmid DNA, and viral vectors—under controlled, reproducible, and scalable conditions. Built upon the foundational principles of Fast Protein Liquid Chromatography (FPLC), the system employs low-pressure, high-resolution liquid chromatography with precise gradient formation, real-time UV/Vis absorbance monitoring, and programmable fraction collection. Its architecture adheres to Good Laboratory Practice (GLP) and supports alignment with Good Manufacturing Practice (GMP) workflows when integrated with compliant data handling protocols. Designed and manufactured in Berlin, Germany, the Bio FPLC integrates robust fluidic control, chemically inert wetted materials (e.g., PEEK, stainless steel 316L, sapphire flow cells), and modular scalability—enabling seamless transition from analytical method development to pilot-scale process validation.
Key Features
- Modular dual-pump configuration with independently controllable solvent delivery, supporting linear, step, or multi-segment gradients with ≤0.2% compositional accuracy across full flow range.
- UV-Vis detection using an external, temperature-stabilized flow cell with 1 mm or 10 mm pathlength options; optical design minimizes baseline drift and enables rapid cleaning via tool-free disassembly.
- Multi-position, high-pressure rotary valves (up to 12 ports) for automated buffer selection, column switching, and directed fraction elution—compatible with up to four parallel columns or guard column setups.
- Integrated pressure monitoring at inlet, column outlet, and post-detector positions with real-time alarm thresholds (0.1–20 bar range) and automatic pump shutdown on overpressure events.
- Compact series (10–50 mL/min) optimized for lab-based process development, offering footprint efficiency (<60 cm width) and compatibility with standard fume hoods; Pilot series (100–1000 mL/min) features reinforced tubing, larger-volume mixing chambers, and industrial-grade actuators for extended duty cycles.
- Optional Simulated Moving Bed (SMB) configuration—implemented via synchronized valve sequencing and dedicated control logic—for continuous, steady-state purification of challenging biomolecule mixtures with improved resin utilization and reduced buffer consumption.
Sample Compatibility & Compliance
The Bio FPLC accommodates a broad spectrum of biological samples—from clarified lysates and cell culture supernatants to purified intermediate fractions—without requiring pre-filtration beyond 0.45 µm (recommended). It supports all common chromatographic resins (e.g., Sepharose®, Capto™, POROS™, and custom-packed media) and operates within pH 2–12 and conductivity ranges up to 200 mS/cm. All fluidic components comply with USP Class VI biocompatibility standards. The system meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. When operated with audit-trail-enabled software (see below), it supports compliance with FDA 21 CFR Part 11 for electronic records and signatures in regulated environments.
Software & Data Management
Control and data acquisition are managed via KNAUER’s ChromoGraph Bio software—a Windows-based platform featuring intuitive graphical method editor, real-time chromatogram overlay, peak integration with baseline correction algorithms (tangent skim, vertical drop), and customizable report templates. All method parameters, instrument states, and raw detector signals are timestamped and stored in encrypted SQLite databases. Audit trail functionality logs user login/logout events, method modifications, and run executions—including operator ID, timestamp, and change description—with write-protection enabled by default. Export formats include CSV, PDF, and AIA (Analytical Instrument Association) standard for LIMS integration. Optional remote monitoring via secure HTTPS interface enables off-site system status checks without compromising network integrity.
Applications
- Monoclonal antibody (mAb) purification workflows: capture (Protein A affinity), intermediate polishing (cation exchange), and final polishing (size exclusion).
- His-tagged protein purification under native or denaturing conditions using immobilized metal affinity chromatography (IMAC).
- Plasmid DNA isolation and endotoxin reduction via anion exchange and hydrophobic interaction chromatography.
- Peptide mapping and fragment analysis following enzymatic digestion, coupled with online desalting and reverse-phase fractionation.
- Process characterization studies including residence time distribution (RTD) analysis, binding capacity determination, and gradient robustness evaluation per ICH Q5A and Q5B guidelines.
- Continuous bioprocessing development using SMB mode for therapeutic enzyme or vaccine antigen purification where batch-to-batch consistency and yield optimization are critical.
FAQ
Is the Bio FPLC compatible with HPLC-grade solvents and aqueous buffers?
Yes—the system’s fluidic path is fully compatible with 100% water, organic modifiers (acetonitrile, methanol, isopropanol), and common aqueous buffers (Tris, phosphate, acetate, citrate) across pH 2–12.
Can I upgrade from Compact to Pilot configuration without replacing the entire system?
Yes—core electronics, software license, and detector modules are shared; only pump heads, tubing assemblies, and valve manifolds require replacement or retrofitting.
Does the system support 21 CFR Part 11 compliance out-of-the-box?
Full compliance requires enabling audit trail, electronic signature, and role-based access control within ChromoGraph Bio—features included in the “Regulatory Edition” software license.
What maintenance intervals are recommended for routine operation?
Pump seals: every 6 months under continuous use; flow cell cleaning: after each run involving viscous or particulate-laden samples; system pressure calibration: annually or after major component replacement.
Is third-party column hardware supported?
Yes—all standard 1/4″-28 and 10-32 threaded column connections are accommodated; KNAUER provides mechanical adapters for common commercial columns (e.g., Cytiva, Tosoh, Agilent).
