Shimadzu LEXT Automated Liquid-Liquid Extraction Platform
| Brand | Shimadzu |
|---|---|
| Origin | Japan |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Origin Category | Imported Instrument |
| Model | LEXT |
| Instrument Type | Liquid-Liquid Extraction System |
| Temperature Range | 0–130 °C |
| Pressure Condition | Ambient (Atmospheric) |
| Extraction Cell Volume | 15 mL |
| Typical Extraction Cycle Time | 10 min |
| Dimensions (W×D×H) | 600 mm × 585 mm × 570 mm |
Overview
The Shimadzu LEXT Automated Liquid-Liquid Extraction Platform is an integrated, programmable sample preparation system engineered for high-reproducibility liquid-liquid extraction (LLE) under controlled thermal conditions. It operates on the fundamental principle of partitioning analytes between two immiscible liquid phases—typically an aqueous sample matrix and an organic solvent—governed by distribution coefficients (KD). Unlike conventional manual or semi-automated LLE workflows, the LEXT platform embeds real-time process monitoring and adaptive response logic into every extraction cycle. Its architecture integrates synchronized shaking (via precision-controlled orbital oscillation), phase separation (using integrated centrifugation), solvent level sensing, emulsion detection via optical and conductometric sensors, and post-extraction concentration—all within a single compact footprint. Designed specifically for laboratories requiring strict chain-of-custody, audit-ready operation, and minimal operator intervention, the LEXT supports unattended overnight runs while maintaining full traceability of method parameters, sensor events, and hardware actuation logs.
Key Features
- Multi-modal extraction capability: Configurable for classical LLE, matrix-assisted liquid-liquid extraction (MA-LLE), and hybrid workflows compatible with QuEChERS and solid-phase extraction (SPE) protocols via method-driven module activation.
- Intelligent emulsion management: Dual-sensor array (optical turbidity + interfacial conductivity) detects incipient emulsion formation during shaking; automatically triggers extended centrifugation, temperature modulation, or solvent ratio adjustment to resolve phase separation without manual intervention.
- Self-contained workflow autonomy: Fully programmable onboard controller enables standalone operation—no continuous PC connection required after method upload. All timing, temperature ramps, rotor speed profiles, and sensor thresholds are stored and executed locally.
- Robust contamination control: Fluidic pathways employ chemically inert PTFE and PEEK components; all solvent-contact surfaces are autoclavable or solvent-rinse compatible. Integrated HEPA-filtered exhaust minimizes cross-contamination in shared lab environments.
- Compact industrial-grade enclosure: 600 mm × 585 mm × 570 mm footprint meets ISO/IEC 17025-compliant laboratory spatial constraints while housing full-shake, spin, and evaporation modules.
Sample Compatibility & Compliance
The LEXT accommodates biological matrices including whole blood, plasma, urine, tissue homogenates, and forensic swab extracts—particularly where low-volume, high-sensitivity analysis (e.g., LC-MS/MS quantification of drugs of abuse or endogenous metabolites) demands stringent recovery consistency. It complies with core regulatory expectations for analytical method validation: each extraction cycle records timestamped metadata—including actual temperature profile, centrifugal g-force applied, solvent volume dispensed (±0.5% volumetric accuracy), and phase separation duration—enabling retrospective assessment per ICH Q2(R2) guidelines. The system supports 21 CFR Part 11-compliant electronic signatures and audit trail generation when operated with optional Shimadzu LabSolutions software. Routine performance verification aligns with ASTM D7067 (standard practice for liquid-liquid extraction of aqueous samples) and ISO 17025 clause 7.7 on equipment verification.
Software & Data Management
Method development occurs via Shimadzu LabSolutions LEXT Module (v3.2+), which provides drag-and-drop protocol builder with parameter locking, version control, and user-role-based access levels (Administrator, Analyst, Reviewer). All raw sensor data (temperature, torque, optical density, conductivity) and actuator logs (shaker RPM, centrifuge acceleration, evaporator setpoint) are embedded in proprietary .lexd binary files, exportable as CSV or PDF reports compliant with GLP/GMP documentation requirements. Audit trails include operator ID, method revision hash, firmware version, and hardware calibration timestamps—retained for ≥36 months per internal retention policy. No cloud dependency: local SQLite database ensures data sovereignty and offline accessibility.
Applications
- Forensic toxicology labs processing casework samples under ISO/IEC 17025 accreditation, where reproducible extraction efficiency directly impacts reporting limits and legal defensibility.
- Clinical reference laboratories performing therapeutic drug monitoring (TDM) or newborn screening, requiring sub-ng/mL recoveries from microliter-scale serum volumes.
- Environmental testing facilities applying EPA Method 1694 (pharmaceuticals and personal care products) with automated LLE replacing manual separatory funnel steps.
- Pharmaceutical QC labs validating stability-indicating assays where forced degradation samples demand consistent phase separation across variable pH and ionic strength conditions.
- Academic proteomics cores implementing automated LLE prior to SISCAPA or immunoaffinity enrichment, minimizing operator-induced variability in biomarker quantification.
FAQ
Can the LEXT perform extraction at elevated temperatures without pressurization?
Yes. The system maintains precise temperature control from 0 °C to 130 °C under ambient pressure using Peltier-cooled/heated blocks and insulated chamber design—ideal for thermally assisted LLE without safety concerns associated with pressurized vessels.
Is method transfer from manual LLE protocols straightforward?
Yes. The LEXT accepts standard LLE parameters (solvent type, volume ratio, shaking time, centrifugation speed/duration) and allows iterative optimization via built-in DOE mode, with automatic calculation of recovery % against internal standards.
Does the system support third-party LIMS integration?
Yes. Through Shimadzu’s OpenLab Connector SDK (REST API), instrument status, run completion signals, and metadata exports can be routed to major LIMS platforms including Thermo Fisher SampleManager, LabVantage, and STARLIMS.
What maintenance intervals are recommended for routine operation?
Daily: Solvent reservoir inspection and waste container emptying. Quarterly: Centrifuge rotor balance verification and optical sensor calibration using NIST-traceable turbidity standards. Annually: Full fluidic path integrity test and firmware validation per Shimadzu Service Bulletin LEXT-SV-2024-01.
