Hitachi Chromaster PLUS High-Performance Liquid Chromatograph

Overview

The Hitachi Chromaster PLUS is a modular, high-reliability high-performance liquid chromatograph engineered for precision, robustness, and long-term operational stability in regulated and research-intensive laboratory environments. Based on classical reversed-phase, normal-phase, and ion-exchange chromatographic principles, the system employs low-dead-volume fluidic pathways, dual-piston reciprocating pumps with active solvent compressibility compensation, and a thermally stabilized optical flow cell to ensure consistent retention time reproducibility and quantitative accuracy across diverse sample matrices. Designed to meet the evolving demands of pharmaceutical quality control, food safety testing, environmental monitoring, and academic research, the Chromaster PLUS delivers deterministic separation performance under both isocratic and gradient elution conditions—supporting method transfer from legacy systems while enabling seamless integration into modern analytical workflows.

Key Features

• High-Pressure Binary Solvent Delivery System: Dual-gradient pump with real-time pressure feedback control enables precise solvent mixing and stable flow delivery up to 60 MPa, supporting UHPLC-compatible columns (e.g., sub-2 µm particles) without compromising system longevity.
• Ultra-Low-Noise UV-Vis Detection (Model 5410): Optical design incorporating a deuterium/tungsten dual-lamp source, holographic grating monochromator, and thermoelectrically cooled photodiode array yields baseline noise ≤0.4 × 10⁻⁵ AU and drift ≤1.0 × 10⁻⁴ AU/h—critical for trace-level quantitation in complex biological or environmental extracts.
• Synchronized Dual-Wavelength Acquisition: Independent wavelength selection at user-defined intervals (400 ms or 800 ms per data point) allows simultaneous monitoring of primary analyte and internal standard or co-eluting interferences—enhancing peak resolution and method robustness for multi-component assays.
• Precision Column Compartment (Model 5310): Air-circulating oven with PID-controlled heating/cooling achieves temperature accuracy ±0.5 °C and stability ≤±0.05 °C over time—minimizing retention time variability and ensuring compliance with ICH Q2(R2) method validation requirements.
• High-Capacity, Low-Cross-Contamination Autosampler: 200-position tray capacity with programmable needle wash cycles, pressurized injection loop, and variable volume syringe-based metering (0.1–100 µL) support unattended operation across extended batch runs in GLP/GMP settings.
• Modular Power Architecture: Integrated power organizer supplies conditioned voltage to all modules independently—reducing electromagnetic interference, simplifying installation, and facilitating future hardware expansion without electrical reconfiguration.

Sample Compatibility & Compliance

The Chromaster PLUS accommodates a broad range of sample types—including small-molecule pharmaceuticals, peptides, organic acids, amino acids, carbohydrates, mycotoxins, pesticides, and veterinary drug residues—when paired with appropriate stationary phases (C18, HILIC, SCX, NH₂, etc.) and mobile phase chemistries. Its hardware and software architecture comply with key regulatory frameworks: data integrity features align with FDA 21 CFR Part 11 (audit trail, electronic signatures, user access levels), while system suitability testing protocols support adherence to USP , EP 2.2.46, and ISO/IEC 17025 documentation standards. The system is validated for use in laboratories operating under GMP, GLP, and ISO 17025-accredited quality management systems.

Software & Data Management

Chromaster Navigator software provides intuitive instrument control, sequence definition, real-time chromatogram visualization, and integrated peak integration with customizable reporting templates. It supports raw data export in open formats (e.g., .CDF, .csv) and includes built-in tools for system suitability assessment (tailing factor, resolution, %RSD of retention time), calibration curve fitting (linear, quadratic, weighted), and forced degradation study tracking. Audit trail functionality records all parameter changes, method modifications, and user logins with timestamps and operator IDs—enabling full traceability during regulatory inspections. Optional LIMS connectivity via ASTM E1578-compliant interfaces facilitates enterprise-wide data harmonization.

Applications

• Pharmaceutical Analysis: Assay and impurity profiling of APIs and finished dosage forms per ICH Q3B guidelines; stability-indicating methods for forced degradation studies; residual solvent analysis per ICH Q3C.
• Food Safety Testing: Quantification of preservatives (e.g., benzoates, sorbates), artificial colors, mycotoxins (aflatoxins, ochratoxin A), pesticide residues (organophosphates, neonicotinoids), and veterinary drugs (sulfonamides, tetracyclines).
• Environmental Monitoring: Analysis of PAHs, PCBs, phenolic compounds, and endocrine-disrupting chemicals in water, soil, and sediment extracts using EPA Methods 8330B, 8082A, and ISO 18857-1.
• Life Sciences Research: Separation and quantification of metabolites in biofluids (plasma, urine); characterization of glycoprotein glycoforms; analysis of nucleosides/nucleotides in cell lysates.

FAQ

Is the Chromaster PLUS compatible with mass spectrometry detectors?
Yes—the system features standard LC-MS interface ports (e.g., ESI, APCI) and supports flow-splitting configurations for optimal coupling with single-quadrupole, triple-quadrupole, and high-resolution mass spectrometers.
Can it be operated in compliance with 21 CFR Part 11?
Yes—Chromaster Navigator includes role-based user authentication, electronic signature capability, immutable audit trails, and secure data archiving functions required for Part 11 compliance.
What column dimensions and particle sizes are supported?
The system is validated for columns ranging from 2.1 mm × 30 mm (UHPLC) to 4.6 mm × 250 mm (standard HPLC), with particle sizes from 1.7 µm to 5 µm, depending on flow rate and backpressure constraints.
Does it support gradient delay volume compensation?
Yes—software-based dwell volume correction algorithms allow users to input measured system delay volumes and automatically adjust gradient start times to ensure method transfer fidelity.
Is remote monitoring available?
Remote instrument status viewing and basic sequence control are supported via secure HTTPS-enabled web interface; full remote operation requires optional VPN-configured network deployment.