Agilent 6890 Gas Chromatograph with Dual Flame Photometric Detectors (FPD)

Overview

The Agilent 6890 Gas Chromatograph equipped with dual Flame Photometric Detectors (FPD) is a high-performance, field-proven analytical platform engineered for selective, sensitive, and reproducible quantification of phosphorus- and sulfur-containing compounds. Based on robust capillary gas chromatography separation coupled with element-specific chemiluminescent detection, this system delivers exceptional signal-to-noise ratios and minimal interferences from hydrocarbon matrices. The instrument implements fifth-generation Electronic Pressure Control (EPC), enabling precise, programmable, and fully documented pneumatic control across all carrier, fuel, and makeup gas lines—critical for method transfer, regulatory compliance, and long-term retention time stability. With rapid oven cooling (<3.5 min from 300 °C to 50 °C) and integrated back-flush capability, the 6890 significantly reduces cycle times without compromising peak resolution or column lifetime. This refurbished unit has undergone full functional validation at SpectraLab Scientific’s ISO/IEC 17025-accredited calibration laboratory and meets original Agilent factory specifications for baseline noise, detector response linearity, and temperature ramp accuracy.

Key Features

• Fully refurbished Agilent 6890 GC chassis with verified operational history (2–3 years of prior use under controlled laboratory conditions)
• Dual-wavelength FPD configuration supporting simultaneous, independent measurement of phosphorus (526 nm) and sulfur (394 nm) emissions
• Factory-calibrated EPC modules for air (0–130 mL/min), hydrogen (0–250 mL/min), and makeup gas (0–130 mL/min) with ≤0.01 psi pressure resolution
• Column oven with programmable ramp rates up to 120 °C/min and thermal uniformity ±0.1 °C across 30 cm of column length
• Integrated self-diagnostic routines including leak detection, valve actuation verification, and detector filament continuity testing
• Compliant with Agilent’s legacy OpenLab CDS v2.x and ChemStation G1701DA software environments for data acquisition and reporting

Sample Compatibility & Compliance

This system is routinely deployed in environmental, petrochemical, and agrochemical laboratories for regulated analysis of organophosphates, mercaptans, sulfides, thiophenes, and pesticide residues per ASTM D5133, EPA Method 8081B, and ISO 11339. The dual-FPD architecture satisfies selectivity requirements outlined in USP for sulfur impurity profiling in pharmaceutical excipients. All EPC parameters are logged with timestamped audit trails, supporting GLP/GMP workflows under FDA 21 CFR Part 11 when used with compliant software configurations. The instrument’s mechanical and electronic subsystems have been verified against Agilent’s published performance verification tests (PVT), including retention time repeatability (RSD <0.05% over 10 injections) and FPD linear dynamic range confirmation using methyl parathion standards.

Software & Data Management

The system operates natively with Agilent ChemStation G1701DA (Rev. A.10.02 or later), providing full method development, sequence control, peak integration, and customizable report generation. Raw data files (.DAT) are stored in vendor-native format with embedded metadata including detector gain settings, gas flow histories, and oven temperature profiles. For laboratories requiring electronic records management, optional integration with OpenLab ECM enables role-based access control, electronic signatures, and automated backup to network-attached storage. All firmware versions are current as of Agilent’s final public release for the 6890 platform (vA.03.02), ensuring compatibility with modern Windows 10/11 workstations via USB or LAN interface.

Applications

• Quantitative determination of total sulfur in diesel fuel per ASTM D5453
• Residue analysis of chlorpyrifos, diazinon, and malathion in food commodities (AOAC 995.11)
• Monitoring sulfur compounds in natural gas streams (ISO 6974-5)
• Phosphorus-based flame retardant screening in polymer extracts
• Method validation support for ICH Q2(R2) guidelines in QC laboratories

FAQ

Is this unit eligible for Agilent factory service contracts?
No—this is a pre-owned instrument sold under SpectraLab Scientific’s 6-month limited warranty. Extended service agreements may be arranged through third-party certified providers upon request.

Does the dual-FPD configuration include both P and S channels on a single detector body or two physically separate detectors?
This system utilizes two independently mounted FPD units, each optimized and calibrated for either phosphorus or sulfur emission, enabling true parallel detection without spectral cross-talk.

Are consumables such as FPD filters, jets, and photomultiplier tubes included?
Standard consumables (e.g., quartz combustion chamber, jet orifices, and PMT housings) are inspected and replaced as needed during refurbishment; a full consumables kit is available separately.

Can this GC be upgraded to support mass spectrometric detection?
The 6890 chassis supports direct coupling to Agilent 5973 or 5975 MSD systems via standard transfer line interfaces; however, no MS components are included in this offering.

What documentation accompanies the instrument?
Each unit ships with a Certificate of Functional Verification, complete service history log, EPC calibration reports, and original Agilent user manuals in English.