Shimadzu Nexera UC LC/SFC Switching System

Overview

The Shimadzu Nexera UC LC/SFC Switching System is an integrated analytical platform engineered for seamless method flexibility between high-performance liquid chromatography (HPLC/UHPLC) and supercritical fluid chromatography (SFC). Unlike conventional standalone systems, this architecture employs a unified pump, autosampler, column oven, and detector interface—reconfigured via software-controlled valve manifolds—to switch between liquid-phase and supercritical CO₂-based mobile phases without hardware reconfiguration or manual tubing changes. The system operates on the fundamental principle that SFC leverages tunable solvent strength and diffusivity of supercritical carbon dioxide (scCO₂), enabling faster mass transfer, lower viscosity, and enhanced selectivity for chiral, polar, and thermally labile compounds where reversed-phase LC exhibits co-elution or poor resolution. Designed for laboratories engaged in pharmaceutical method development, natural product analysis, and synthetic chemistry QC, the Nexera UC delivers reproducible retention time alignment across modes—critical for orthogonal method validation and regulatory submission support.

Key Features

• Single-platform dual-mode operation: Full UHPLC performance (≤130 MPa compatible with optional upgrades) and SFC capability (up to 66 MPa) within one instrument footprint and control environment.
• Intelligent flow-path reconfiguration: Automated, leak-tight switching between LC and SFC fluidic paths using precision solenoid valves and pressure-compensated back-pressure regulators (BPRs), minimizing dead volume and ensuring retention time stability.
• Broad detector interoperability: Native integration with Shimadzu SPD-M30A UV/VIS, SPD-M40 PDA, and LCMS-8040/8050 triple quadrupole MS systems—supporting both UV absorbance quantitation and mass-selective detection in either mode.
• High-precision binary gradient delivery: Dual plunger pumps with active check valve monitoring deliver flow accuracy ≤±0.1% RSD and composition precision ≤±0.15% over 0.4–5.0000 mL/min range, essential for gradient SFC method robustness.
• Thermally stabilized column compartment: Temperature control from 5 °C to 85 °C (±0.1 °C) ensures consistent retention behavior during method transfer between LC and SFC conditions.

Sample Compatibility & Compliance

The Nexera UC accommodates diverse analyte classes—including small-molecule APIs, chiral intermediates, lipids, steroids, and oligonucleotide fragments—without requiring derivatization or extensive sample cleanup. Its SFC mode excels with compounds exhibiting moderate polarity (log P 1–5) and low to medium molecular weight (<1,500 Da), particularly where silica- or polysaccharide-based chiral columns are employed. From a regulatory standpoint, the system supports audit-trail-enabled operation per FDA 21 CFR Part 11 when used with LabSolutions LC/GCMS software v5.9 or later. It facilitates GLP-compliant method development workflows aligned with ICH Q2(R2) guidelines and enables comparative data generation meeting ASTM E2917-21 (Standard Practice for Validation of Chromatographic Methods) requirements for orthogonal separation verification.

Software & Data Management

Control and data acquisition are managed through Shimadzu’s LabSolutions software suite, which provides dedicated LC/SFC method templates, real-time BPR pressure monitoring, CO₂ density calculation modules, and automated method translation tools (e.g., LC gradient → SFC modifier gradient mapping). All raw data—including pressure transients, flow profiles, and detector signals—are timestamped and stored in secure, vendor-neutral .csv and .cdf formats. The software supports electronic signatures, user access level management (administrator/operator/auditor), and full audit trail export for internal QA review or regulatory inspection. Integration with LIMS via ASTM E1578-compliant drivers enables traceable sample tracking across multiple analytical platforms.

Applications

• Chiral method scouting and optimization: Rapid screening of >20 chiral stationary phases under SFC conditions while retaining LC-based reference standards for absolute configuration confirmation.
• Orthogonal method development for ICH Q5 and Q6 compliance: Generating complementary selectivity data to justify specification limits and impurity profiling strategies.
• Green analytical chemistry implementation: Reducing organic solvent consumption by ≥70% versus traditional HPLC methods—supporting corporate sustainability reporting and ISO 14001-aligned lab operations.
• Preparative-scale method translation: Leveraging analytical SFC separations to inform flow rate, modifier %, and column dimensions for downstream purification on preparative SFC systems.
• Stability-indicating assay development: Resolving degradants with similar UV spectra but distinct retention mechanisms in LC vs. SFC—enhancing forced degradation study confidence.

FAQ

Can the system operate LC and SFC simultaneously?
No—LC and SFC modes are sequential and mutually exclusive due to fundamental differences in mobile phase compressibility, detector compatibility, and pressure control requirements. However, mode switching is completed in <90 seconds with automatic system equilibration.
Is CO₂ handling integrated into the system?
The Nexera UC requires external CO₂ supply (cylinder or bulk source) and does not include refrigeration or subcooling modules; users must install a certified CO₂ delivery line with particulate filtration and moisture trap per ISO 8573-1 Class 2 requirements.
What column hardware is required for SFC operation?
Standard 1/16″ stainless steel tubing and Vespel-seal fittings are recommended; fused-silica capillaries are not suitable. Columns must be rated for ≥66 MPa and equipped with SFC-compatible end-fittings (e.g., Waters ACQUITY UPC² or YMC CHIRALPAK series).
Does the system support temperature-programmed SFC?
Yes—column oven temperature ramping (0.1–20 °C/min) is fully programmable and synchronized with modifier gradient and back-pressure profiles to optimize enantioselectivity and efficiency.
How is method transfer validated between LC and SFC modes?
Shimadzu provides application notes outlining retention time correlation protocols, peak purity assessment using PDA spectral overlay, and system suitability criteria (tailing factor, resolution, %RSD of RT) aligned with USP and EP 2.2.46.