Agilent 6890 GC System with Dual Nitrogen-Phosphorus Detectors (NPD)
| Brand | Agilent Technologies |
|---|---|
| Origin | Canada |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported Instrument |
| Model | 6890N, Dual NPD |
| Price Range | USD 1,500–7,500 (FOB) |
| Product Category | Chromatography |
| Service Life | 2–3 years |
| Warranty | 6 months |
Overview
The Agilent 6890 GC System with Dual Nitrogen-Phosphorus Detectors (NPD) is a rigorously refurbished, high-performance gas chromatograph engineered for selective, trace-level detection of nitrogen- and phosphorus-containing compounds in complex matrices. Based on the proven Agilent 6890N platform, this configuration leverages advanced Electronic Pneumatic Control (EPC) architecture and precision oven temperature management to deliver exceptional retention time stability (<0.0008 min RSD) and peak area reproducibility (<1% RSD). The dual-NPD setup enables parallel or sequential analysis—ideal for method development, confirmation runs, or high-throughput screening where compound class specificity and low detection limits are critical. Each NPD operates independently with fully programmable gas flows (air: 0–200 mL/min; H2: 0–30 mL/min; make-up gas: 0–100 mL/min), supporting both packed and capillary column configurations up to 400 °C oven temperature.
Key Features
- Refurbished and functionally validated by SpectraLab Scientific—a PROFIT 500–ranked Canadian provider of pre-owned analytical instrumentation since 2003
- Dual independent NPD modules with identical performance specifications: MDL ≤ 0.4 pg N/s and ≤ 0.2 pg P/s (tested with azobenzene/malathion/stearylamine mixtures)
- Dynamic linear range >105 for both nitrogen and phosphorus detection
- Selectivity ratios of 25,000:1 (N/C) and 75,000:1 (P/C), minimizing interference from hydrocarbon-rich backgrounds
- High-speed data acquisition at up to 200 Hz per detector—essential for narrow peak resolution in fast GC methods
- Integrated EPC modules optimized for inlet pressure control, split/splitless injection, and detector gas regulation
- Compliant with ASTM D5504, EPA Method 8080A, and USP for pesticide and alkaloid residue analysis
Sample Compatibility & Compliance
This system is routinely deployed for regulatory-compliant analysis of organophosphates, carbamates, amines, nitroaromatics, and heterocyclic compounds in environmental water, soil extracts, food commodities, and pharmaceutical intermediates. Its dual-NPD architecture supports GLP-aligned workflows, including instrument qualification (IQ/OQ/PQ), calibration verification, and system suitability testing per ICH Q2(R2) guidelines. All refurbished units undergo full operational validation—including leak testing, baseline noise assessment (<0.5 pA), and sensitivity verification using certified reference standards—prior to shipment. Documentation includes a Certificate of Functional Verification and a traceable maintenance log aligned with ISO/IEC 17025–recommended practices for used equipment.
Software & Data Management
The system is compatible with Agilent ChemStation Rev. A.03.04 or later (Windows 7/10 64-bit), enabling full method development, sequence control, and quantitative reporting with audit trail functionality. Data files (.D files) support 21 CFR Part 11–compliant electronic signatures when deployed with appropriate network authentication and user role management. Raw signal outputs from both NPDs are time-synchronized and exportable in ASCII or CSV format for integration into LIMS environments or third-party chemometric platforms (e.g., MATLAB, Python-based SciPy pipelines). Optional upgrades include OpenLab CDS licensing for enhanced data integrity controls and automated report generation.
Applications
- Environmental monitoring: Quantification of chlorpyrifos, diazinon, and parathion in groundwater per EPA SW-846 Method 8080A
- Food safety: Screening for pesticide residues in fruits, vegetables, and cereals under EU Regulation (EC) No 396/2005
- Pharmaceutical QC: Detection of amine impurities and phospholipid degradation products in APIs and injectables
- Forensic toxicology: Identification of nitrogen-rich alkaloids (e.g., nicotine, morphine derivatives) in biological fluids
- Academic research: Reaction monitoring of phosphorus-catalyzed cross-coupling reactions via real-time product profiling
FAQ
Is this unit eligible for extended warranty or service contract coverage?
Yes—SpectraLab Scientific offers optional 12- and 24-month extended service plans covering parts, labor, and on-site technician support.
Does the system include a computer, software license, or data acquisition hardware?
No—the quoted configuration includes only the GC mainframe, dual NPD detectors, and standard gas lines. A compatible Windows PC with licensed ChemStation software must be sourced separately.
Can this instrument be upgraded to support mass spectrometric detection?
Mechanically, the 6890N chassis supports MS interface installation; however, no MS source or quadrupole module is included. Retrofitting requires additional vendor-certified components and alignment services.
What documentation accompanies the instrument upon delivery?
Each unit ships with a Certificate of Functional Verification, refurbishment summary report, calibration certificate (traceable to NIST SRMs), and safety compliance statement (CE, CSA, UL 61010-1).
Are consumables such as columns, septa, or NPD rubidium beads available through SpectraLab?
Yes—we maintain inventory of Agilent-certified GC consumables, including HP-5ms, DB-1701, and NPD-specific ceramic rubidium beads (p/n 5183-4705), with same-day shipping from our Toronto facility.
