东西分析 GC-4000A Series Gas Chromatograph
| Brand | Dongxi Analysis |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Regional Classification | Domestic (PRC) |
| Model | GC-4000A |
| Instrument Type | Benchtop Laboratory Gas Chromatograph |
| Application Scope | General-Purpose Analytical GC |
| Oven Temperature Range | (Ambient + 5)°C to 400°C |
| Programmable Temperature Ramp | Up to 40°C/min (typical range) |
| Carrier Gas Flow Control Range | 0–100 mL/min (N₂, H₂, He) |
| Carrier Gas Pressure Control Range | 0–100 psi |
| Injector Maximum Operating Temperature | 400°C |
| Injector Pressure Setting Range | 0–100 psi |
| Injector Total Flow Setting Range | 0–120 mL/min |
| Detector Options | TCD, FID, FPD, NPD, ECD (user-selectable, up to three simultaneously) |
| Column Compatibility | Packed columns and capillary columns (0.1–0.53 mm ID) |
| Temperature Zones | 7 independently controlled zones (oven, injector ×1, detectors ×3, auxiliary ×2) |
| Oven Programmability | 10-step temperature program with ramp hold |
| Cooling | Motorized rear door auto-opening for accelerated oven cooldown |
| Gas System | Configurable single/dual/triple gas channels |
Overview
The Dongxi Analysis GC-4000A Series Gas Chromatograph is a modular, benchtop analytical instrument engineered for precision separation and quantitative detection of volatile and semi-volatile organic compounds in diverse laboratory environments. Based on classical gas chromatographic principles—where analytes are partitioned between a mobile phase (inert carrier gas) and a stationary phase (coated capillary or packed column)—the GC-4000A delivers high reproducibility and method robustness across routine QC, environmental monitoring, petrochemical analysis, and academic research applications. Its architecture supports dual operational paradigms: conventional packed-column analysis for legacy methods and high-resolution capillary separations compatible with modern regulatory workflows. The system operates under ISO/IEC 17025-aligned laboratory conditions and is designed to meet essential performance criteria outlined in ASTM D3606, EPA Method 8021B, and USP , particularly when configured with FID or ECD detectors.
Key Features
- Modular detector configuration: Select and install up to three detectors simultaneously—TCD, FID, FPD, NPD, or ECD—with fully independent electronic circuits and dedicated analog/digital signal outputs for parallel data acquisition.
- Seven-zone independent temperature control: Includes column oven, one programmable injector port, three detector compartments, and two auxiliary heating zones—each with real-time PID regulation, overtemperature cutoff, and ±0.1°C stability at setpoint.
- High-capacity column oven: Accommodates up to three capillary columns (0.1–0.53 mm ID) or multiple packed columns; supports 10-step programmable ramping with ramp rates from 0.1 to 40°C/min.
- Digital gas management system: Triple-channel pressure/flow control with 0.1 psi resolution; configurable for single-, dual-, or triple-gas operation (e.g., carrier, makeup, and detector gases); integrated leak-tolerant pressure regulation.
- Thermal management enhancements: Motor-driven rear oven door automatically opens during cool-down cycles, reducing post-run oven recovery time by up to 45% compared to passive cooling.
- Expandable interface suite: Standard support for backflush valves, precut columns, nickel-catalyzed methanizers (for CO/CO₂ conversion), and programmable pyrolysis units—enabling extended application coverage in speciation and trace-level hydrocarbon analysis.
Sample Compatibility & Compliance
The GC-4000A accepts liquid, gaseous, and solid-phase microextraction (SPME) samples via split/splitless, on-column, or cold-on-column injection modes. It maintains compatibility with standard 4–5 mm OD glass or fused-silica capillary columns meeting ASTM E1709 and ISO 10101 specifications. All thermal zones comply with IEC 61010-1 safety requirements for laboratory equipment. When operated with audit-trail-enabled software (e.g., Dongxi ChromaLink v3.x), the system supports GLP/GMP documentation standards—including user access controls, electronic signatures, and 21 CFR Part 11-compliant data integrity protocols—subject to validated software deployment and site-specific IQ/OQ/PQ execution.
Software & Data Management
ChromaLink GC Control Software provides instrument control, sequence definition, real-time signal visualization, peak integration (with baseline correction, retention time locking, and spectral deconvolution options), and customizable report generation. Raw data files (.cdf or .dx) are stored in vendor-neutral formats compatible with third-party chemometric tools (e.g., MATLAB, Simca, or OpenChrom). The software includes built-in calibration curve management (linear, quadratic, weighted), QC flagging per USP , and automated pass/fail evaluation against pre-defined specification limits. Audit trails record all parameter changes, method edits, and data exports with timestamped user attribution.
Applications
- Environmental testing: BTEX, PAHs, chlorinated solvents (EPA 8240/8260), and pesticide residues (EPA 8081/8270).
- Petrochemical QA/QC: Hydrocarbon type analysis (HTA), simulated distillation (ASTM D2887), and sulfur compound profiling (ASTM D5453).
- Pharmaceutical impurity profiling: Residual solvent quantification per ICH Q3C guidelines using headspace-GC/FID.
- Food & flavor analysis: Volatile organic compound fingerprinting (e.g., esters, aldehydes, terpenes) and adulteration screening.
- Forensic toxicology: Blood alcohol and drug metabolite screening via GC-MS-ready sample introduction.
FAQ
Is the GC-4000A compliant with 21 CFR Part 11 for regulated laboratories?
Yes—when deployed with ChromaLink v3.5+ and validated local server infrastructure, the system supports electronic signature workflows, audit trail logging, and role-based access control required for FDA-regulated submissions.
Can I upgrade a single-detector configuration to a triple-detector setup post-purchase?
Yes—the chassis design includes reserved detector mounting rails, power distribution headers, and signal bus expansion slots; field upgrades require certified service technician installation and firmware reconfiguration.
What column dimensions and phases are supported out-of-the-box?
Standard support includes 15–60 m × 0.25–0.53 mm ID fused silica columns with 0.1–5.0 µm film thicknesses (e.g., DB-5ms, HP-INNOWAX, RTX-1); custom phase validation kits available upon request.
Does the system support unattended overnight operation?
Yes—integrated hardware watchdog timers, automatic oven cooldown sequencing, and power-fail resume functionality enable reliable multi-sample batch runs without manual intervention.
Is remote diagnostics and firmware update capability available?
Remote maintenance is supported via secure TLS-encrypted VNC session (customer-configured); firmware updates are delivered as signed binary packages with SHA-256 checksum verification and rollback safeguards.
