Agilent G3440A FPD Flame Photometric Detector (Model 241 with EPC)

Overview

The Agilent G3440A Flame Photometric Detector (FPD), Model 241 with integrated Electronic Pressure Control (EPC), is a high-sensitivity, sulfur- and phosphorus-selective detector designed for integration into Agilent 7890-series and compatible gas chromatography systems. Based on the principle of chemiluminescence—where sulfur- and phosphorus-containing compounds undergo controlled combustion in a hydrogen-rich flame to emit characteristic blue (S, ~394 nm) or green (P, ~526 nm) light—the G3440A delivers selective, quantitative detection at sub-picogram levels. Its optical path features thermally stabilized photomultiplier tube (PMT) detection, narrow-band interference filters, and optimized flame geometry to ensure reproducible signal response across extended operational cycles. As a factory-original, pre-owned module, this unit has undergone full functional verification per Agilent’s legacy service protocols and retains full mechanical and electrical compatibility with standard GC oven mounting brackets, detector baseplates, and Agilent ChemStation/OpenLab CDS firmware interfaces.

Key Features

• Sulfur- and phosphorus-specific detection with dual-wavelength capability (394 nm and 526 nm), configurable via front-panel or software-selectable filter wheel
• Integrated Electronic Pressure Control (EPC) for precise, automated regulation of H₂, air, and make-up gas flows—enabling retention time stability and method transfer compliance
• Thermally compensated PMT housing and sealed optical chamber to minimize drift during multi-hour analyses
• Standard RS-232 and Agilent proprietary digital I/O interface for seamless communication with Agilent GC controllers and data systems
• Pre-owned unit certified to meet original Agilent performance specifications: baseline noise ≤ 0.5 pA, S/N ≥ 500:1 (for 100 pg S as methyl sulfide), linear dynamic range > 10⁴ for both S and P
• Includes original Agilent detector cable harness, EPC control module, and calibration certificate traceable to NIST-standard reference materials

Sample Compatibility & Compliance

The G3440A FPD is routinely deployed in regulated environments for analysis of organosulfur compounds (e.g., mercaptans, sulfides, thiophenes) and organophosphorus agents (e.g., pesticides, nerve agent simulants, flame retardants). It supports EPA Method 8081B (organophosphorus pesticides), ASTM D5292 (sulfur in distillate fuels), and ISO 20846 (sulfur in automotive gasoline). When operated within Agilent’s validated GC platform and paired with appropriate column chemistry (e.g., DB-1701, HP-PONA), the detector meets GLP documentation requirements and supports 21 CFR Part 11-compliant audit trails when used with OpenLab CDS v2.3 or later. All units are inspected for leak integrity (helium leak rate < 1×10⁻⁸ atm·cm³/s), burner alignment, and EPC pressure accuracy (±0.02 psi over 0–100 psi range).

Software & Data Management

The G3440A operates natively under Agilent ChemStation Rev. E.02.02.1400 and newer, as well as OpenLab CDS v2.2+. Detector parameters—including PMT voltage, filter selection, EPC setpoints, and flame ignition logic—are fully programmable within sequence methods. Real-time diagnostics (flame status, EPC valve position, PMT temperature) are logged with timestamped event markers. Raw signal output is digitized at 20 Hz with 16-bit resolution and exported in standard .D format. Audit trail functionality records all parameter changes, user logins, and calibration events—meeting ALCOA+ data integrity principles for regulated QC/QA laboratories.

Applications

• Environmental monitoring: Quantification of sulfur compounds in stack emissions, natural gas, and refinery effluents per EPA TO-15 and Method 1664
• Petrochemical QA: Sulfur speciation in jet fuel, diesel, and naphtha per ASTM D2622 and IP 287
• Agrochemical residue analysis: Multi-residue screening of organophosphate pesticides in food commodities (AOAC 2007.01)
• Pharmaceutical impurity profiling: Detection of phosphine-based catalyst residues in API synthesis intermediates
• Forensic toxicology: Identification and quantification of phosphorus-based chemical warfare agent degradation products

FAQ

Is this unit compatible with Agilent 8890 GC systems?
Yes—the G3440A Model 241 with EPC maintains full hardware and firmware interoperability with Agilent 7890B, 8890, and 8860 GC platforms when running supported CDS versions.
Does the unit include EPC calibration documentation?
Yes—each detector ships with a completed EPC verification report, including pressure linearity, step-response time, and valve hysteresis test results.
What maintenance history is available?
All units undergo full optical alignment verification, PMT gain calibration, and flame stoichiometry optimization; service logs (date, technician ID, test outcomes) are provided upon request.
Can this FPD be upgraded to support simultaneous S/P detection?
No—Model 241 is a single-channel, manually switched configuration; simultaneous dual-wavelength detection requires the G3440-60001 dual-PMT upgrade kit (not included).
Is remote technical support available post-purchase?
Yes—dedicated application engineering support is offered for method development, troubleshooting, and regulatory documentation assistance under optional annual support contracts.