LCTech FREESTYLE GPC EVA Automated Gel Permeation Chromatography System with Integrated Evaporative Concentration
| Brand | LCTech |
|---|---|
| Origin | Germany |
| Model | FREESTYLE GPC EVA |
| Flow Rate | 0–40 mL/min |
| Maximum Pressure | 3000 psi |
| Flow Stability | ±0.1% |
| Auto-sampler Capacity | 30–60 vials |
| Auto-sampler Volume per Vial | 100 mL |
| Vacuum Pump | Chemically resistant diaphragm pump, variable-frequency controlled, pumping speed 0.8 m³/h, ultimate vacuum 2 mbar (1.5–760 torr) |
| Evaporation Principle | Low-temperature vacuum evaporation with PID-controlled jacketed heating block for room-temperature final volume adjustment |
Overview
The LCTech FREESTYLE GPC EVA is an integrated, fully automated gel permeation chromatography (GPC) purification and evaporative concentration system engineered for high-throughput, reproducible sample cleanup in environmental, food safety, and pharmaceutical laboratories. It combines size-exclusion chromatography—based on the physical separation of analytes from macromolecular matrix interferences (e.g., lipids, proteins, humic substances) using calibrated cross-linked polystyrene-divinylbenzene columns—with a precisely synchronized, programmable evaporation module (EVA). Unlike discrete purification and concentration workflows, the FREESTYLE GPC EVA executes both steps sequentially within a single platform under unified software control, eliminating manual transfer, reducing solvent exposure, and minimizing analyte loss or degradation—particularly critical for thermolabile compounds such as certain organophosphorus pesticides, mycotoxins, and endogenous phytochemicals.
Key Features
- High-precision dual-piston HPLC-grade solvent delivery system ensuring stable flow rates across the full 0–40 mL/min range with ≤±0.1% stability—essential for consistent column resolution and retention time reproducibility.
- Integrated low-temperature vacuum evaporation module employing water-bath-assisted vacuum concentration followed by nitrogen-assisted final-stage concentration; enables gentle removal of volatile organic solvents without thermal stress.
- PID-controlled jacketed heating block for final volume adjustment at ambient temperature—eliminates overheating during endpoint definition and maximizes recovery of volatile and semi-volatile analytes.
- Onboard chemically resistant, oil-free, variable-frequency diaphragm vacuum pump (0.8 m³/h, 2 mbar ultimate vacuum), eliminating maintenance-intensive oil changes and ensuring compatibility with aggressive solvents including chlorinated hydrocarbons and acetone.
- Modular nitrogen blow-down enhancement option for sub-milliliter endpoint precision—programmable gas flow rate and pressure ramping to prevent splashing or foaming during final concentration.
- High-efficiency vortex concentration chamber design minimizes bubble formation, reduces carryover between samples, and improves solvent removal kinetics without mechanical agitation.
Sample Compatibility & Compliance
The FREESTYLE GPC EVA accommodates complex, high-lipid, high-protein, and particulate-laden extracts derived from diverse matrices—including animal tissue, edible oils, cereal grains, herbal powders, soil slurries, sediment homogenates, and aqueous environmental extracts. Its robust column chemistry and flow-path inertness (stainless steel + PEEK components) ensure compatibility with common GPC eluents (e.g., cyclohexane/ethyl acetate, tetrahydrofuran, dichloromethane). The system is validated for compliance with internationally recognized method standards, including EPA Method 846 (Section 3540C, 3620C), AOAC Official Methods of Analysis®, EN 12393 (pesticide residue analysis in food), EN 1528 (fat determination in foodstuffs), and EU Regulation (EC) No 396/2005 Annex I. It supports GLP-compliant operation through audit-trail-enabled method logging, electronic signatures, and full traceability of instrument parameters, run sequences, and calibration records.
Software & Data Management
Controlled via LCTech’s proprietary FREESTYLE software suite, the system provides intuitive method development, sequence programming, real-time monitoring, and automated report generation. All hardware modules—including autosampler, GPC pump, fraction collector, EVA unit, and vacuum pump—are natively integrated into a single interface with synchronized timing logic. Software supports method validation protocols (linearity, LOD/LOQ, recovery, repeatability), automatic peak integration for fraction triggering, and export of structured data (CSV, PDF, XML) compatible with LIMS and ELN environments. Full 21 CFR Part 11 compliance is achievable with optional user access controls, electronic signature modules, and immutable audit trails.
Applications
This system is routinely deployed in accredited testing laboratories for multi-residue analysis targeting persistent organic pollutants (POPs) and regulated contaminants. Key applications include: cleanup of QuEChERS and ASE extracts prior to GC-MS/MS or LC-MS/MS analysis of pesticide residues in fruits, vegetables, and cereals; lipid removal from fish oil and liver homogenates prior to PCB and dioxin congener quantification; deproteinization and macro-molecule elimination from plasma or urine prior to veterinary drug residue screening; and isolation of PAHs and alkylated homologues from contaminated soils and sediments. Its automation fidelity ensures >95% inter-run recovery consistency for analytes ranging from highly volatile (e.g., chlorpyrifos-methyl) to non-volatile (e.g., dehydroabietic acid).
FAQ
What types of solvents are compatible with the EVA module?
Cyclohexane, ethyl acetate, dichloromethane, acetone, hexane, toluene, and THF—all commonly used in GPC elution and post-extraction concentration—are fully supported. Solvent compatibility is confirmed per ASTM D471 and ISO 1817 guidelines for elastomer and polymer contact materials.
Can the system perform solvent exchange (e.g., hexane → acetonitrile)?
Yes—method-defined solvent switching is supported via programmable valve sequencing and gradient-compatible pump control, enabling seamless transition between cleanup and analytical-ready solvent conditions.
Is remote monitoring and troubleshooting available?
The FREESTYLE software includes secure HTTPS-based remote access capability (with configurable firewall permissions), allowing qualified personnel to monitor active runs, review logs, and initiate diagnostic routines without local presence.
How is system performance verified after installation?
LCTech provides IQ/OQ documentation packages aligned with ISO/IEC 17025 requirements, including column efficiency testing (theoretical plates), flow accuracy verification (gravimetrically calibrated), vacuum integrity checks, and recovery validation using certified reference materials (e.g., SRM 1588b, NIST).
