Agilent 6850A Gas Chromatograph with Cold-On-Column (COC) Injector and FID Detector

Overview

The Agilent 6850A Gas Chromatograph is a compact, high-performance benchtop GC system engineered for precision, reliability, and ease of integration in regulated and research laboratory environments. Built on Agilent’s proven gas chromatography architecture, the 6850A employs capillary column separation coupled with flame ionization detection (FID) and cold-on-column (COC) sample introduction — a technique that minimizes thermal degradation of thermally labile analytes and ensures superior peak shape and quantitative reproducibility for volatile and semi-volatile organic compounds. Its compact oven design (56.8 × 28.3 × 49.0 cm) delivers rapid heating and cooling cycles — up to 120 °C/min ramp rates and cooling to −20 °C — without requiring high-voltage power supplies, thanks to low thermal mass construction. All pneumatic parameters — including inlet pressure, split ratio, carrier gas flow, and detector makeup gas — are controlled via integrated Electronic Pressure Control (EPC), enabling full method programmability and retention time stability across runs.

Key Features

• Compact footprint optimized for space-constrained laboratories without compromising analytical capability
• Cold-on-column (COC) injector (G2630A) for direct, solvent-free introduction of temperature-sensitive samples
• Hydrogen Flame Ionization Detector (FID) with linear dynamic range >10⁷ and detection limit <1.8 pg C/s (as hexadecane)
• Front-panel interface with six dedicated buttons for instrument status monitoring, method selection (up to five preloaded methods), and run initiation/termination
• Top-access oven lid enabling unobstructed, tool-free column installation and maintenance at both inlet and detector ends
• Integrated LAN port supporting TCP/IP communication for remote monitoring, data transfer, and networked instrument management
• Reduced CO₂ consumption by 50% versus full-size GC systems during cryogenic cooling operations

Sample Compatibility & Compliance

The 6850A COC/FID configuration supports analysis of a broad spectrum of volatile and semi-volatile organics, including hydrocarbons, alcohols, esters, pesticides, residual solvents, and environmental contaminants (e.g., BTEX, PAHs, chlorinated benzenes). It is routinely deployed in compliance-driven applications aligned with ASTM D3606 (gasoline hydrocarbon analysis), ISO 10301 (petroleum product testing), and USP (chromatographic separations in pharmaceutical quality control). When operated with validated ChemStation methods and enabled audit-trail functionality, the system meets foundational requirements for GLP and GMP environments under FDA 21 CFR Part 11 — particularly when paired with secure user access controls, electronic signatures, and immutable data archiving protocols.

Software & Data Management

This refurbished unit ships with Agilent ChemStation Rev. A.03.04 or later, configured for basic acquisition, integration, calibration, and reporting. The software supports customizable report templates, peak purity assessment, and multi-level user permissions. Raw data (.D files) are stored in vendor-native format compatible with Agilent OpenLab CDS and third-party data review platforms. Instrument diagnostics, method versioning, and sequence logs are retained locally and exportable for internal QA review or regulatory submission. Optional upgrades to OpenLab CDS or MassHunter (for future MS coupling) are available upon request.

Applications

• Quality control of petrochemical feedstocks and finished fuels
• Residual solvent analysis in active pharmaceutical ingredients (APIs) per ICH Q3C guidelines
• Environmental monitoring of soil/water extracts for VOCs and SVOCs
• Flavor and fragrance profiling in food and cosmetic matrices
• Forensic toxicology screening for volatiles in biological specimens
• Method development and validation support in contract research laboratories

FAQ

Is this unit factory-refurbished or dealer-refurbished?
This Agilent 6850A system has undergone comprehensive technical refurbishment by SpectraLab Scientific’s certified service engineers, including full functional verification, leak testing, detector sensitivity calibration, and firmware update to current stable release.
Does the COC inlet support programmable temperature control?
Yes — the G2630A cold-on-column inlet features independent temperature zoning and ramp programming synchronized with oven events, enabling precise thermal focusing and solvent elimination protocols.
Can this GC be upgraded to support other detectors?
The 6850A platform is mechanically and electronically compatible with Agilent’s electron capture detector (ECD), thermal conductivity detector (TCD), and nitrogen-phosphorus detector (NPD); detector swaps require corresponding EPC module reconfiguration and software licensing.
What documentation is included with purchase?
Each unit ships with a Certificate of Operational Verification, detailed refurbishment report, original Agilent safety manual (digital), and ChemStation quick-start guide.
Is remote support available post-installation?
Yes — SpectraLab Scientific provides 6 months of complimentary email-based technical support and optional paid on-site service contracts for extended coverage.