ZHONGKEHUIFEN HF-900 Laboratory Gas Chromatograph
| Brand | ZHONGKEHUIFEN |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | HF-900 |
| Instrument Type | Benchtop Laboratory Gas Chromatograph |
| Application Scope | General-Purpose |
| Oven Temperature Range | Ambient + 3°C to 450°C |
| Oven Ramp Rate | 0.1–40°C/min |
| Oven Cool-Down Time | ~8 min (450°C → 50°C) |
| Carrier Gas Flow Range & Control | 0–1200 mL/min |
| Carrier Gas Pressure Range & Control | 0–970 kPa |
| Injector Maximum Operating Temperature | 450°C |
| Injector Pressure Setting Range | 0–970 kPa |
| Injector Total Flow Setting Range | 0–1200 mL/min |
Overview
The ZHONGKEHUIFEN HF-900 is a benchtop laboratory gas chromatograph engineered for precision, stability, and operational flexibility in routine analytical environments. It operates on the fundamental principle of gas-phase separation—where volatile and semi-volatile compounds are partitioned between a mobile phase (inert carrier gas) and a stationary phase (capillary or packed column) under precisely controlled thermal gradients. Designed for broad-spectrum deployment across academic, industrial, and regulatory laboratories, the HF-900 supports method development, quality control, environmental monitoring, and food safety screening. Its modular architecture accommodates multiple detector configurations—including Flame Ionization Detector (FID), Thermal Conductivity Detector (TCD), and Flame Photometric Detector (FPD)—enabling selective detection of hydrocarbons, permanent gases, sulfur/phosphorus-containing compounds, and other target analytes without hardware replacement.
Key Features
- Seven independently programmable temperature zones—including oven, up to three injectors, and up to three detectors—each maintaining thermal stability within ±0.1°C over extended run times.
- Vertical heated split/splitless injector with adjustable septum purge, backflush, tail-purge flow, and variable split ratio (1:1 to 1:1000), optimized for reproducible capillary column introduction.
- High-capacity column oven accommodating simultaneous installation of multiple column types: fused-silica capillaries (up to 105 cm), stainless-steel packed columns, and microbore formats—supporting method transfer and multi-column validation workflows.
- Advanced temperature programming: up to 20 ramp segments per method, with ramp rates from 0.1 to 40°C/min and precise hold-time resolution down to 0.1 min.
- Integrated carrier gas control system featuring digital mass flow controllers (MFCs) and pressure regulators, enabling real-time, closed-loop regulation of flow (0–1200 mL/min) and head pressure (0–970 kPa) across all inlet and detector modules.
- Robust front-panel interface with large backlit LCD display, supporting full instrument diagnostics, parameter logging, and method recall—even during power interruption, thanks to non-volatile memory and battery-backed clock.
Sample Compatibility & Compliance
The HF-900 is compatible with standard GC sample introduction techniques: liquid syringe injection, gas-tight loop injection (via optional 6-port valve), and thermal desorption (with external module integration). It meets baseline performance requirements outlined in ISO 17025 for accredited testing laboratories and supports compliance-driven workflows aligned with USP , ASTM D3606/D5501, EPA Method 8021B/8260C, and GB/T 3361–2021. While not pre-certified for 21 CFR Part 11, its software architecture permits audit-trail-enabling upgrades and electronic signature integration when deployed with validated third-party LIMS or CDS platforms. All thermal modules undergo factory calibration traceable to NIST-certified reference standards; temperature accuracy is verified per IEC 61000-4-30.
Software & Data Management
The HF-900 operates with vendor-supplied Windows-based ChromaLink™ acquisition and analysis software (v3.2+), supporting real-time signal visualization, peak integration using tangent skim and valley-to-valley algorithms, retention time locking, and custom report generation (PDF, CSV, XML). Raw data files adhere to ANDI/NetCDF format for cross-platform compatibility with OpenLab CDS, Chromeleon, and Empower. The system logs all method parameters, instrument status events, and user actions—including login/logout timestamps, method edits, and sequence modifications—facilitating GLP/GMP-compliant record retention. Data integrity safeguards include write-once media export options and configurable auto-backup intervals.
Applications
- Petroleum refining: hydrocarbon group-type analysis (PIONA), benzene/toluene/xylenes (BTX) quantification, and simulated distillation (SimDis).
- Environmental testing: VOCs in air/water (EPA TO-17/TO-14), pesticide residues in soil (GB 23200.113), and chlorinated solvents in groundwater.
- Food & beverage: fatty acid methyl ester (FAME) profiling, ethanol/methanol content in spirits, residual solvents in packaging materials (ISO 105-E03).
- Pharmaceutical QC: residual solvents in APIs (ICH Q3C), assay purity of volatile excipients, and stability-indicating assays for thermolabile actives.
- Academic research: reaction monitoring, polymer additive migration studies, and breath biomarker profiling (e.g., isoprene, acetone, aldehydes).
FAQ
What detector configurations are supported out-of-the-box?
The HF-900 ships with mounting interfaces and electrical/power provisions for FID, TCD, and FPD. Detector electronics, hydrogen/air generators (for FID), and optical filters (for FPD) are configured at order entry.
Can the instrument be upgraded to support electronic pressure control (EPC)?
Yes—optional EPC modules are available for both inlet and detector gas lines, providing sub-kPa pressure resolution and automated method-based pressure ramping.
Is remote operation and monitoring possible?
The system includes Ethernet (RJ-45) and RS-232 ports; ChromaLink™ supports secure remote desktop access via IT-managed VLANs and TLS-encrypted data transmission.
What column dimensions and phases are compatible?
Standard 0.1–0.53 mm ID fused-silica capillaries (up to 60 m), 1/8″ and 1/4″ OD packed columns (up to 4 m), and guard columns with universal ferrule systems (Vespel/graphite).
Does the HF-900 meet ISO/IEC 17025 calibration requirements?
All temperature and flow sensors are calibrated pre-shipment against NIST-traceable references; full calibration certificates—including uncertainty budgets—are provided with each unit.
