Shimadzu LC-6AD Semi-Preparative Liquid Chromatograph (Refurbished)

Overview

The Shimadzu LC-6AD Semi-Preparative Liquid Chromatograph is a high-performance, refurbished HPLC system engineered for reproducible semi-preparative separations in pharmaceutical development, natural product isolation, and synthetic chemistry laboratories. Built upon Shimadzu’s legacy of precision fluid handling and optical detection, the LC-6AD employs a parallel dual-piston reciprocating pump architecture to deliver stable, pulse-free solvent delivery across a wide flow range (0.001–20 mL/min) and pressure envelope (up to 49 MPa). Its integrated UV-Vis detector features a thermally stabilized flow cell and wavelength calibration traceable to NIST standards, enabling quantitative analysis with ASTM D5838-compliant linearity up to 2.5 AU. Designed for method translation from analytical to semi-preparative scale, the system supports column dimensions from 10 mm to 30 mm i.d., with minimized extra-column volume to preserve resolution during fraction collection.

Key Features

• Parallel dual-piston pump with active solvent compressibility compensation, ensuring high flow accuracy (±1% or ±10 µL/min) and exceptional precision (±0.3% RSD) across the full operational range.
• High-pressure gradient mixing (2–3 solvents) with real-time pressure monitoring and automatic leak detection—optimized for method robustness under variable viscosity conditions.
• UV-Vis detector with 190–700 nm scanning capability, <1 nm wavelength accuracy, and baseline noise ≤±0.25×10⁻⁵ AU — suitable for low-concentration analyte detection and peak purity assessment.
• Autosampler with programmable injection volumes (1 µL–5 mL), temperature-controlled sample tray (optional L/S cooler), and <0.5% RSD injection repeatability — validated per USP chromatographic system suitability criteria.
• Dedicated recirculation mode enabling repeated passage of sample through the same column — critical for resolving structurally similar isomers where conventional single-pass separation fails.
• Full system pressure rating of 34.3 MPa at the autosampler and detector interfaces, compatible with modern sub-2 µm and core-shell stationary phases.

Sample Compatibility & Compliance

The LC-6AD accommodates standard stainless-steel and PEEK-lined semi-preparative columns (e.g., Shim-pack PREP series, Waters XBridge Prep, Phenomenex Luna), as well as custom-packed glass or Hastelloy hardware for aggressive mobile phases. It complies with ISO/IEC 17025 requirements for equipment verification when operated within its validated parameters. All electronic modules—including pump controller, detector data acquisition board, and autosampler logic unit—support audit trail generation and user access control consistent with FDA 21 CFR Part 11 Annex 11 expectations for regulated environments. Routine operation meets GLP/GMP documentation standards when paired with Shimadzu’s Class I-certified LabSolutions software (v5.9 or later).

Software & Data Management

Data acquisition, sequence control, and post-run processing are managed via Shimadzu LabSolutions LC/GC software, which provides instrument control, peak integration using tangent skim and valley-to-valley algorithms, and customizable report templates compliant with regulatory submission formats (e.g., PDF/A-1b, CSV export). Raw data files (.lcd) are stored with embedded metadata including operator ID, method version, calibration history, and system suitability test results. The software supports electronic signatures, event logging, and role-based permissions — fully traceable for internal QA review or external audit. Optional integration with LIMS platforms (e.g., Thermo Fisher SampleManager, LabVantage) is available via ASTM E1384-compliant API interfaces.

Applications

• Isolation of chiral and positional isomers in asymmetric synthesis workflows, leveraging the recirculation function to achieve baseline resolution unattainable with linear gradient methods.
• Purification of peptide intermediates and oligonucleotide fragments prior to mass spectrometric characterization or biological assay.
• Stability-indicating method development for generic drug substances, where forced degradation products must be resolved from the main peak under stressed conditions.
• Standardization of botanical extracts via preparative-scale fractionation followed by offline NMR or HRMS analysis.
• Method transfer between QC labs and pilot-scale manufacturing units, facilitated by consistent dwell volume and gradient delay time across LC-6AD installations.

FAQ

Is this LC-6AD unit certified for GMP use?
Each refurbished LC-6AD undergoes factory-level IQ/OQ validation with documented test protocols, including flow accuracy verification, wavelength calibration, and pressure decay testing. Final certification is issued upon successful completion of site-specific PQ testing conducted by the end-user or authorized service partner.
Can the system be upgraded to support modern communication protocols (e.g., Ethernet, USB 3.0)?
Yes — the base configuration includes RS-232 and GPIB interfaces; optional Ethernet-to-GPIB bridges and USB 3.0 DAQ modules are available and fully supported in LabSolutions v5.9+.
What maintenance documentation accompanies the instrument?
A complete service history log, original Shimadzu manuals (English), calibration certificates for detector lamp and flow sensor, and a 6-month parts-and-labor warranty certificate are provided digitally and in hard copy.
Is column oven integration possible?
The LC-6AD chassis includes mounting provisions and power terminals for Shimadzu CTO-10ASvp or CTO-20A column ovens (operating range: 4–85 °C), both of which maintain ±0.1 °C thermal stability per ISO 17025 clause 5.5.2.
Does the recirculation function require additional hardware or software licensing?
No — recirculation control is embedded in the native pump firmware and activated via LabSolutions method editor without add-on licenses or third-party modules.