Chrom PSANA 6850 Online Helium Ionization Gas Chromatograph
| Brand | Chrom |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | PSANA 6850 |
| Instrument Type | Online Gas Chromatograph |
| Application Field | High-Purity Gas Analysis |
| Oven Temperature Range | 15 °C to 400 °C |
| Oven Ramp Rate | 0.1–35 °C/min |
| Oven Cool-Down | 2500 °C to 35 °C in ~10 min |
| Carrier Gas Flow Range & Control | 0–350 mL/min |
| Carrier Gas Pressure Range & Control | 0–500 kPa |
| Injector Maximum Operating Temperature | 400 °C |
| Injector Pressure Setpoint Range | 0–500 kPa |
| Injector Total Flow Setpoint Range | 0–500 mL/min |
| Detector | Pulsed Discharge Helium Ionization Detector (PDHID) |
| PDHID Temperature Stability | ±0.1 °C |
| Baseline Noise | ≤0.5 pA |
| Baseline Drift | ≤1.0 pA/30 min |
| Repeatability (CH₄) | RSD ≤3.0% |
| Detection Limit (CH₄) | ≤3.5×10⁻¹³ g/mL |
| EPC Pressure Accuracy | ±0.01 psi |
| EPC Flow Sensor Accuracy | <±5% |
| Detector EPC Module Accuracy | ±8% of setpoint |
| Analog Output | 4–20 mA (8–12 channels) |
| Digital Interface | RS232 / RS485 / Ethernet |
Overview
The Chrom PSANA 6850 Online Helium Ionization Gas Chromatograph is a purpose-built analytical platform engineered for continuous, unattended monitoring of ultra-high-purity (UHP) industrial gases—including nitrogen, argon, oxygen, hydrogen, helium, and specialty gas blends—where trace-level impurities (ppb to low-ppm) must be quantified with high reproducibility and long-term stability. Unlike conventional flame ionization or thermal conductivity detectors, the PSANA 6850 integrates a pulsed discharge helium ionization detector (PDHID), which operates by generating metastable helium atoms in a micro-discharge plasma; these atoms induce efficient, non-destructive ionization of nearly all organic and inorganic compounds—including permanent gases (e.g., H₂, O₂, N₂, CO, CO₂, CH₄)—without requiring hydrogen or air supply. This makes the system intrinsically safe, maintenance-light, and uniquely suited for Class 1 Div 1 hazardous area deployment in semiconductor fab gas delivery systems, cryogenic plant purity verification, and electronic-grade gas certification laboratories.
Key Features
- Integrated Electronic Pressure Control (EPC) architecture across all gas pathways: dual independent EPC modules for carrier gas and detector make-up gas, plus three configurable EPC-enabled inlet ports supporting simultaneous multi-stream analysis.
- Thermally optimized oven with precision PID-controlled heating and forced-air cooling, enabling rapid thermal cycling (2500 °C → 35 °C in ≈10 min) while maintaining ±0.1 °C isothermal stability at detector and column zones.
- Robust PDHID with active temperature regulation, baseline noise ≤0.5 pA, and drift ≤1.0 pA/30 min—validated per ASTM D7622 and ISO 8573-5 protocols for trace hydrocarbon and moisture surrogate detection in inert matrices.
- Fail-safe operational logic: automatic power-loss recovery with retained method parameters, carrier gas depletion shutdown, real-time pressure/flow fault diagnostics, and configurable 4–20 mA alarm outputs tied to user-defined threshold events.
- Industrial-grade I/O interface suite: 8–12 isolated 4–20 mA analog outputs for direct PLC integration, dual serial ports (RS232/RS485) compliant with Modbus RTU, and IEEE 802.3 Ethernet with embedded web server for remote configuration and diagnostic logging.
Sample Compatibility & Compliance
The PSANA 6850 is validated for direct injection of compressed gases at pressures up to 500 kPa, with compatibility across stainless-steel, electropolished, and passivated flow paths to prevent adsorption or catalytic decomposition of reactive analytes (e.g., NH₃, HCl, silanes). It supports packed columns (e.g., Molecular Sieve 5A, Porapak Q) and fused-silica capillaries (e.g., Al₂O₃/KCl, CP-PoraPLOT U) for separation of C₁–C₆ hydrocarbons, noble gas contaminants, and polar impurities. The system meets mechanical and electrical safety requirements per IEC 61000-6-2/6-4 (EMC), UL 61010-1 (safety), and complies with data integrity expectations under FDA 21 CFR Part 11 when operated with optional audit-trail-enabled software. Routine calibration follows ISO/IEC 17025-aligned procedures using NIST-traceable gas standards.
Software & Data Management
ChromControl™ v4.2 (included) provides embedded firmware-based acquisition and real-time peak integration with retention time locking (RTL) for multi-day method robustness. Raw chromatograms and processed results are stored locally on industrial-grade SSD with optional encrypted backup to network-attached storage (NAS). All 4–20 mA outputs support linear or logarithmic scaling per analyte; digital reports export in CSV, PDF, and XML formats compatible with LIMS (e.g., LabWare, Thermo SampleManager). Audit trail functionality records operator actions, parameter changes, and calibration events with immutable timestamps—fully traceable for GLP/GMP audits.
Applications
- Real-time monitoring of bulk nitrogen and argon supply lines in semiconductor front-end fabs (SEMI F57-compliant impurity profiling).
- Continuous verification of helium purity in MRI and superconducting magnet coolant circuits (detection of O₂, N₂, CH₄, H₂O down to sub-ppb levels).
- Quality release testing of electronic specialty gases per SEMI C37, ASTM D7622, and JIS K0070 standards.
- Leak detection and residual gas analysis in vacuum chamber purging systems via automated cycle sampling.
- Environmental monitoring of landfill biogas upgrading streams (CH₄/CO₂/H₂S quantification without flame-based detection).
FAQ
What gases can the PDHID detect without calibration?
The PDHID responds to virtually all compounds except helium and neon; absolute quantification requires response factor calibration using certified standard mixtures.
Is the system compatible with hazardous area classification Zone 1?
Yes—when equipped with ATEX/IECEx-certified purge enclosures (optional accessory), the PSANA 6850 meets EN 60079-0 and EN 60079-15 for use in Zone 1 environments.
Can the instrument operate unattended for extended periods?
Yes—integrated self-diagnostics, auto-restart after power interruption, and scheduled maintenance alerts enable >30-day unattended operation with periodic standard gas verification.
Does it support ASTM D7622-compliant reporting?
Yes—the software includes preconfigured report templates aligned with ASTM D7622 Annex A1 for helium purity assessment, including mandatory uncertainty estimation per GUM guidelines.
What column configurations are recommended for oxygen/nitrogen separation?
A 3-m × 1/8″ stainless-steel Molecular Sieve 5A column at 50 °C with argon carrier gas achieves baseline resolution of O₂/N₂ in <4 minutes, validated per ISO 8573-5.
